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/yaml/highlights.scm

@@ -0,0 +1,42 @@
+(boolean_scalar) @constant.builtin.boolean
+(null_scalar) @constant.builtin
+(double_quote_scalar) @string
+(single_quote_scalar) @string
+(block_scalar) @string
+(string_scalar) @string
+(escape_sequence) @constant.character.escape
+(integer_scalar) @constant.numeric.integer
+(float_scalar) @constant.numeric.float
+(comment) @comment
+(anchor_name) @type
+(alias_name) @type
+(tag) @type
+(yaml_directive) @keyword
+
+(block_mapping_pair
+  key: (flow_node [(double_quote_scalar) (single_quote_scalar)] @variable.other.member))
+(block_mapping_pair
+  key: (flow_node (plain_scalar (string_scalar) @variable.other.member)))
+
+(flow_mapping
+  (_ key: (flow_node [(double_quote_scalar) (single_quote_scalar)] @variable.other.member)))
+(flow_mapping
+  (_ key: (flow_node (plain_scalar (string_scalar) @variable.other.member))))
+
+[
+","
+"-"
+":"
+">"
+"?"
+"|"
+] @punctuation.delimiter
+
+[
+"["
+"]"
+"{"
+"}"
+] @punctuation.bracket
+
+["*" "&" "---" "..."] @punctuation.special