feat!: align standard captures with upstream

Problem: Sharing highlight queries with upstream tree-sitter and
Helix is difficult.

Solution: Where reasonable, use capture names in tree-sitter's standard
list or Helix's Atom-style hierarchy.

Specifically:

* tree-sitter "standard capture names"
  (https://github.com/tree-sitter/tree-sitter/blob/3f44b896852eb7daaa6df4fb778c9bb52c70c815/highlight/src/lib.rs#L20-L72):

  - `@parameter` -> `@variable.parameter`
  - `@field` -> `@variable.member`
  - `@namespace` -> `@module`
  - `@float` -> `@number.float`
  - `@symbol` -> `@string.special.symbol`
  - `@string.regex` -> `@string.regexp`
  - `@text.*` -> `@markup.*` (`strong`, `italic`, `link`, `strikethrough`; with exceptions; see below)
  - `@text.title` -> `@markup.heading`
  - `@text.literal` -> `@markup.raw`
  - `@text.reference` -> `@markup.link`
  - `@text.uri` -> `@markup.link.url` (in markup links)
  - `@string.special` -> `@markup.link.label` (non-url links)
  - `@punctuation.special` -> `@markup.list` (markdown lists only; move subitems from `@text.todo`)

* Helix captures
  (https://docs.helix-editor.com/master/themes.html#syntax-highlighting):

  - `@method` -> `@function.method`
  - `@method.call` -> `@function.method.call`
  - `@text.{todo,warning,note,danger}` -> `@comment.{error,warning,hint,info,todo}`
  - `@text.diff.{add,delete,}` -> `@diff.{plus,minus,delta}`
  - `@text.uri` -> `@string.special.url` (outside markup)
  - `@preproc` -> `@keyword.directive`
  - `@define` -> `@keyword.directive`(`.define`?)
  - `@storageclass` -> `@keyword.storage`
  - `@conditional` -> `@keyword.conditional`
  - `@debug` -> `@keyword.debug`
  - `@exception` -> `@keyword.exception`
  - `@include` -> `@keyword.import`
  - `@repeat` -> `@keyword.repeat`

* cleanup

  - remove some redundant `@conceal` (but still allow it for conceal-only patterns)
  - remove obsolete `@error` (syntax linting is out of scope for this repo)
  - sort, cleanup capture list in `CONTRIBUTING.md`

1 files changed, 11 insertions, 11 deletions

diff --git a/queries/gitcommit/highlights.scm b/queries/gitcommit/highlights.scm
index 9c70e19b5..d475021c2 100644
--- a/queries/gitcommit/highlights.scm
+++ b/queries/gitcommit/highlights.scm
@@ -1,17 +1,17 @@
 (comment) @comment
 (generated_comment) @comment
-(title) @text.title
-(text) @text
-(branch) @text.reference
+(title) @markup.heading
+; (text) @none
+(branch) @markup.link
 (change) @keyword
-(filepath) @text.uri
+(filepath) @string.special.url
 (arrow) @punctuation.delimiter
 
-(subject) @text.title @spell
-(subject (overflow) @text @spell)
+(subject) @markup.heading @spell
+(subject (overflow) @none @spell)
 (subject (subject_prefix) @function @nospell)
 (prefix (type) @keyword @nospell)
-(prefix (scope) @parameter @nospell)
+(prefix (scope) @variable.parameter @nospell)
 (prefix [
     "("
     ")"
@@ -21,12 +21,12 @@
     "!"
 ] @punctuation.special)
 
-(message) @text @spell
+(message) @spell
 
 (trailer (token) @label)
-(trailer (value) @text)
+; (trailer (value) @none)
 
-(breaking_change (token) @text.warning)
-(breaking_change (value) @text @spell)
+(breaking_change (token) @comment.warning)
+(breaking_change (value) @none @spell)
 
 (scissor) @comment