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/tests/query/highlights/python/pattern_matching.py b/tests/query/highlights/python/pattern_matching.py
index cd359a48f..2762781b0 100644
--- a/tests/query/highlights/python/pattern_matching.py
+++ b/tests/query/highlights/python/pattern_matching.py
@@ -1,29 +1,29 @@
 match command.split():
-# ^ @conditional
+# ^ @keyword.conditional
     case ["quit"]:
-    # ^ @conditional
+    # ^ @keyword.conditional
         print("Goodbye!")
         quit_game()
     case ["look"]:
-    # ^ @conditional
+    # ^ @keyword.conditional
         current_room.describe()
     case ["get", obj]:
-    # ^ @conditional
+    # ^ @keyword.conditional
         character.get(obj, current_room)
     case ["go", direction]:
-    # ^ @conditional
+    # ^ @keyword.conditional
         current_room = current_room.neighbor(direction)
     # The rest of your commands go here
 
 match command.split():
-# ^ @conditional
+# ^ @keyword.conditional
     case ["drop", *objects]:
-    # ^ @conditional
+    # ^ @keyword.conditional
         for obj in objects:
             character.drop(obj, current_room)
 
 match command.split():
-# ^ @conditional
+# ^ @keyword.conditional
     case ["quit"]: ... # Code omitted for brevity
     case ["go", direction]: pass
     case ["drop", *objects]: pass
@@ -32,12 +32,12 @@ match command.split():
                                                    # ^^ @@function.macro
 
 match command.split():
-# ^ @conditional
+# ^ @keyword.conditional
     case ["north"] | ["go", "north"]:
-    # ^ @conditional
+    # ^ @keyword.conditional
         current_room = current_room.neighbor("north")
     case ["get", obj] | ["pick", "up", obj] | ["pick", obj, "up"]:
-    # ^ @conditional
+    # ^ @keyword.conditional
         pass
 
 match = 2