Problem: Captures used by bundled parsers are not highlighted by default
Solution: Add links to default groups
A link is added for a capture if
* there is a default group of the same name (e.g., `@tag` -> `Tag`)
* it's used in a bundled query and doesn't have a reasonable fallback
(e.g., `@text.literal`)
Also add all linked groups to the treesitter docs.
aa2f08a050
