Add analyze highlights script (#10855)

Adds a script to print all unique highlight keys for building syntax
themes.

Usage:

- `python script/analyze_highlights.py` OR
- `python script/analyze_highlights.py -v`
- Using the `-v` or `--verbose` arg will print each language that uses
each key.

Example output:

```
@attribute (6)
@boolean (5)
@charset (1)
@comment (19)
@comment.doc (3)
@comment.unused (2)
@constant (27)
@constant.builtin (15)
@constant.character (1)
@constructor (4)
@embedded (10)
@emphasis (1)
@emphasis.strong (1)
@escape (4)
@function (44)
@function.builtin (2)
@function.definition (2)
@function.method (22)
@function.method.builtin (3)
@function.special (4)
@function.special.definition (1)
@import (1)
@keyframes (1)
@keyword (32)
@label (2)
@link_text (1)
@link_uri (1)
@media (1)
@module (1)
@namespace (1)
@number (16)
@operator (24)
@property (11)
@property.json_key (1)
@punctuation (1)
@punctuation.bracket (28)
@punctuation.delimiter (12)
@punctuation.list_marker (1)
@punctuation.special (17)
@string (23)
@string.doc (1)
@string.escape (5)
@string.regex (7)
@string.special (4)
@string.special.symbol (2)
@supports (1)
@tag (14)
@text.literal (2)
@title (1)
@type (28)
@type.builtin (4)
@type.super (3)
@variable (5)
@variable.member (3)
@variable.parameter (4)
@variable.special (12)

Extension-only:

@tag.delimiter (1)
```

Verbose example output:

```
Shared:

@attribute (6) - [css, heex, javascript, tsx]
@boolean (5) - [javascript, proto, tsx, typescript, yaml]
@charset (1) - [css]
@comment (19) - [bash, c, cpp, css, elixir, erb, go, gomod, gowork, heex, javascript, json, proto, python, ruby, rust, tsx, typescript, yaml]
@comment.doc (3) - [elixir]
@comment.unused (2) - [elixir]
@constant (27) - [bash, c, cpp, elixir, heex, javascript, json, proto, python, ruby, rust, tsx, typescript]
@constant.builtin (15) - [elixir, go, javascript, python, ruby, tsx, typescript, yaml]
@constant.character (1) - [regex]
@constructor (4) - [tsx, typescript]
@embedded (10) - [bash, elixir, javascript, python, ruby, tsx, typescript]
@emphasis (1) - [markdown]
@emphasis.strong (1) - [markdown]
@escape (4) - [go, python, regex, ruby]
@function (44) - [bash, c, cpp, css, elixir, go, heex, javascript, python, rust, tsx, typescript]
@function.builtin (2) - [python]
@function.definition (2) - [rust]
@function.method (22) - [go, javascript, python, ruby, rust, tsx, typescript]
@function.method.builtin (3) - [ruby]
@function.special (4) - [c, cpp, rust]
@function.special.definition (1) - [rust]
@import (1) - [css]
@keyframes (1) - [css]
@keyword (32) - [bash, c, cpp, css, elixir, erb, go, gomod, gowork, heex, javascript, jsdoc, proto, python, ruby, rust, tsx, typescript]
@label (2) - [c, cpp]
@link_text (1) - [markdown]
@link_uri (1) - [markdown]
@media (1) - [css]
@module (1) - [heex]
@namespace (1) - [css]
@number (16) - [bash, c, cpp, css, elixir, go, javascript, json, proto, python, regex, ruby, rust, tsx, typescript, yaml]
@operator (24) - [bash, c, cpp, css, elixir, go, gomod, gowork, heex, javascript, proto, python, regex, ruby, tsx, typescript]
@property (11) - [bash, c, cpp, css, javascript, python, regex, rust, tsx, typescript, yaml]
@property.json_key (1) - [json]
@punctuation (1) - [elixir]
@punctuation.bracket (28) - [c, cpp, elixir, go, heex, javascript, json, proto, regex, ruby, rust, tsx, typescript, yaml]
@punctuation.delimiter (12) - [c, cpp, css, elixir, heex, javascript, proto, regex, ruby, tsx, typescript, yaml]
@punctuation.list_marker (1) - [markdown]
@punctuation.special (17) - [elixir, javascript, python, ruby, tsx, typescript, yaml]
@string (23) - [bash, c, cpp, css, elixir, go, gomod, gowork, heex, javascript, json, proto, python, regex, ruby, rust, tsx, typescript, yaml]
@string.doc (1) - [python]
@string.escape (5) - [elixir, javascript, tsx, typescript, yaml]
@string.regex (7) - [elixir, javascript, ruby, tsx, typescript]
@string.special (4) - [css, elixir]
@string.special.symbol (2) - [elixir, ruby]
@supports (1) - [css]
@tag (14) - [css, heex, javascript, tsx]
@text.literal (2) - [markdown]
@title (1) - [markdown]
@type (28) - [c, cpp, css, elixir, go, javascript, jsdoc, proto, python, ruby, rust, tsx, typescript, yaml]
@type.builtin (4) - [javascript, rust, tsx, typescript]
@type.super (3) - [ruby]
@variable (5) - [c, cpp, javascript, tsx, typescript]
@variable.member (3) - [go, ruby]
@variable.parameter (4) - [ruby]
@variable.special (12) - [cpp, css, javascript, ruby, rust, tsx, typescript]

Extension-only:

@tag.delimiter (1) - [astro]
```

Release Notes:

- N/A

---------

Co-authored-by: Joseph T. Lyons <JosephTLyons@gmail.com>

script/analyze_highlights.py

@@ -0,0 +1,68 @@
+"""
+This script analyzes all the highlight.scm files in our embedded languages and extensions.
+It counts the number of unique instances of @{name} and the languages in which they are used.
+
+This is useful to help avoid accidentally introducing new tags when appropriate ones already exist when adding new languages.
+
+Flags:
+-v, --verbose: Include a detailed list of languages for each tag found in the highlight.scm files.
+"""
+
+from collections import defaultdict
+from pathlib import Path
+from typing import Any
+import argparse
+import re
+
+pattern = re.compile(r'@(?!_)[a-zA-Z_.]+')
+
+def parse_arguments():
+    parser = argparse.ArgumentParser(description='Analyze highlight.scm files for unique instances and their languages.')
+    parser.add_argument('-v', '--verbose', action='store_true', help='Include a list of languages for each tag.')
+    return parser.parse_args()
+
+def find_highlight_files(root_dir):
+    for path in Path(root_dir).rglob('highlights.scm'):
+        yield path
+
+def count_instances(files):
+    instances: defaultdict[list[Any], dict[str, Any]] = defaultdict(lambda: {'count': 0, 'languages': set()})
+    for file_path in files:
+        language = file_path.parent.name
+        with open(file_path, "r") as file:
+            text = file.read()
+            matches = pattern.findall(text)
+            for match in matches:
+                instances[match]['count'] += 1
+                instances[match]['languages'].add(language)
+    return instances
+
+def print_instances(instances, verbose=False):
+    for item, details in sorted(instances.items(), key=lambda x: x[0]):
+        languages = ', '.join(sorted(details['languages']))
+        if verbose:
+            print(f"{item} ({details['count']}) - [{languages}]")
+        else:
+            print(f"{item} ({details['count']})")
+
+def main():
+    args = parse_arguments()
+
+    base_dir = Path(__file__).parent.parent
+    core_path = base_dir / 'crates/languages/src'
+    extension_path = base_dir / 'extensions/astro/languages'
+
+    core_instances = count_instances(find_highlight_files(core_path))
+    extension_instances = count_instances(find_highlight_files(extension_path))
+
+    unique_extension_instances = {k: v for k, v in extension_instances.items() if k not in core_instances}
+
+    print('Shared:\n')
+    print_instances(core_instances, args.verbose)
+
+    if unique_extension_instances:
+        print('\nExtension-only:\n')
+        print_instances(unique_extension_instances, args.verbose)
+
+if __name__ == '__main__':
+    main()