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/zig/highlights.scm b/queries/zig/highlights.scm
index 9ba764b10..875235412 100644
--- a/queries/zig/highlights.scm
+++ b/queries/zig/highlights.scm
@@ -10,12 +10,12 @@
   variable_type_function: (IDENTIFIER)
 ] @variable
 
-parameter: (IDENTIFIER) @parameter
+parameter: (IDENTIFIER) @variable.parameter
 
 [
   field_member: (IDENTIFIER)
   field_access: (IDENTIFIER)
-] @field
+] @variable.member
 
 ;; assume TitleCase is a type
 (
@@ -48,7 +48,7 @@ parameter: (IDENTIFIER) @parameter
 function: (IDENTIFIER) @function
 function_call: (IDENTIFIER) @function.call
 
-exception: "!" @exception
+exception: "!" @keyword.exception
 
 (
   (IDENTIFIER) @variable.builtin
@@ -71,12 +71,12 @@ field_constant: (IDENTIFIER) @constant
 
 (BUILTINIDENTIFIER) @function.builtin
 
-((BUILTINIDENTIFIER) @include
-  (#any-of? @include "@import" "@cImport"))
+((BUILTINIDENTIFIER) @keyword.import
+  (#any-of? @keyword.import "@import" "@cImport"))
 
 (INTEGER) @number
 
-(FLOAT) @float
+(FLOAT) @number.float
 
 [
   "true"
@@ -133,23 +133,23 @@ field_constant: (IDENTIFIER) @constant
   "if"
   "else"
   "switch"
-] @conditional
+] @keyword.conditional
 
 [
   "for"
   "while"
   "break"
   "continue"
-] @repeat
+] @keyword.repeat
 
 [
   "usingnamespace"
-] @include
+] @keyword.import
 
 [
   "try"
   "catch"
-] @exception
+] @keyword.exception
 
 [
   "anytype"
@@ -169,7 +169,7 @@ field_constant: (IDENTIFIER) @constant
   "align"
   "callconv"
   "linksection"
-] @storageclass
+] @keyword.storage
 
 [
   "comptime"