Add basic Syntax highlighting for VIM

contrib/vim/README.md

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+Install vim syntaxt highlighting for Hurl
+
+```
+mkdir -p ~/.vim/{ftdetect,syntax}
+cp ftdetect/hurl.vim ~/.vim/ftdetect
+cp syntax/hurl.vim ~/.vim/syntax
+```
+
+Activate syntax highlighting in your ~/.vimrc
+```
+syntax on
+```
+
+
+
+

contrib/vim/ftdetect/hurl.vim

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+autocmd BufRead,BufNewFile *.hurl set filetype=hurl
+

contrib/vim/syntax/hurl.vim

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+" Vim syntax file
+" Language: Hurl (https://hurl.dev)
+
+if exists("b:current_syntax")
+  finish
+endif
+
+syntax match Method  "^GET"
+syntax match Method  "^POST"
+syntax match Method  "^PUT"
+syntax match Method  "^DELETE"
+syntax match Method  "^CONNECT"
+syntax match Method  "^OPTIONS"
+syntax match Method  "^TRACE"
+syntax match Method  "^PATCH"
+
+syntax match Comment "#.*$"
+syntax match EscapeNumberSign  "\\#"
+syntax match EscapeQuote  "\\\"" 
+syntax match Section "\[[A-Za-z]*\]"
+syntax match Number  "\s[0-9]*"
+
+syntax region String start='"' end='"'  contains=EscapeQuote
+syntax region String start='```' end='```'
+syntax region Json   start='{' end='}'
+
+
+" colors
+highlight Comment             ctermfg=grey
+highlight Method              ctermfg=yellow
+highlight Section             ctermfg=magenta
+highlight String              ctermfg=green
+highlight Json                ctermfg=green
+highlight Number              ctermfg=lightblue
+highlight EscapeNumberSign    ctermfg=white
+highlight EscapeQuote         ctermfg=green
+
+

contrib/vim/test.hurl

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+# This is a comment
+GET http://example.com
+Header1: Value1
+Header2: a\#    # value with \#
+Header3: GET   
+
+HTTP/1.1 200
+[Asserts]
+body not contains "#"            # Other comment
+body not contains "[Asserts]"
+body not contains "200"
+body not contains "GET"
+body not contains "\"\#"
+
+
+POST http://example.com
+{
+  "id": 123,
+  "message": "Hello"
+}
+
+
+POST http://example.com
+```
+Hello
+```
+
+
+