feat(highlight): migrate to tree-house with Helix queries

Replace tree-sitter-highlight dep with tree-house crate from Helix
editor. Add ropey dependency required by tree-house.

Reorganize query files from Helix's runtime/queries/ for all 14
supported languages:
- bash, c, css, go, html, javascript, json, markdown, nix, python,
  rust, toml, typescript, yaml
- Include ecma, _javascript, _typescript base dirs for JS/TS inheritance
- Copy highlights.scm, injections.scm, locals.scm where available

This commit establishes the foundation; highlight.rs implementation
will follow in subsequent commits.

queries/python/injections.scm

@@ -0,0 +1,14 @@
+((comment) @injection.content
+ (#set! injection.language "comment"))
+
+; Match all 9 functions in the `re` module from the standard library that
+; that takes a regex pattern as first argument.
+; https://docs.python.org/3/library/re.html#functions
+(call
+  function: (attribute
+    object: (identifier) @_module (#eq? @_module "re")
+    attribute: (identifier) @_function (#any-of? @_function "compile" "search" "match" "fullmatch" "sub" "subn" "findall" "finditer" "split"))
+  arguments: (argument_list
+    . (string
+        (string_content) @injection.content))
+  (#set! injection.language "regex"))