Add JSDoc scope (#29476)

This is a small PR that adds a `.jsdoc` scope to JSDoc tokens, just like
[JSX](3fdbc3090d/crates/languages/src/javascript/highlights.scm (L239))
has a specific scope.
This effectively allows differentiating between JavaScript keywords and
JSDoc tags in comments.

Release Notes:

  - Add scope for JSDoc

crates/languages/src/jsdoc/highlights.scm

@@ -1,2 +1,2 @@
-(tag_name) @keyword
-(type) @type
+(tag_name) @keyword.jsdoc
+(type) @type.jsdoc