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/ecma/locals.scm

@@ -0,0 +1,26 @@
+; Scopes
+;-------
+
+[
+  (statement_block)
+  (arrow_function)
+  (function_expression)
+  (function_declaration)
+  (method_definition)
+  (for_statement)
+  (for_in_statement)
+  (catch_clause)
+  (finally_clause)
+] @local.scope
+
+; Definitions
+;------------
+
+; i => ...
+(arrow_function
+  parameter: (identifier) @local.definition.variable.parameter)
+
+; References
+;------------
+
+(identifier) @local.reference