* Update ssh_backend.md
* Update normalize_output_to_unicode_nfc.md
* Update strikethrough_position.md
* Update underline_position.md
* Update underline_thickness.md
* Fix lua config docs titles to be formatted as inline code
* Mention how suggested alphabet for quick select is choosen
* Mention update-status and update-right-status for status_update_interval
* Fix docs for all keyassignments to be formatted as inline code
* Fix Lua object index titles
* Fix titles of `wezterm.*` module index pages
* Fix title of `Color` object & `wezterm.color` functions
We reduce titles from h2 to h1 because mkdocs defaults the page title to
the page file name if no h1 header is found.
* Unify title of all object methods
* Add index page for Gui events
Nudge new users towards using this style:
```lua
local config = {}
config.color_scheme = 'Batman'
return config
```
and surface how to write lua modules closer to the main section
on config files. In that lua modules section, nudge towards using
a convention similar to that of the plugin spec described in
this commit: e4ae8a844d
This makes it possible to configure wezterm to eg: triple click
on command input (or output) to select the entire input or output
without messing around trying to find the bounds.
The docs have an example of how to configure this; it requires
setting up shell integration to define the appropriate semantic
zones.
