feat(native): port Groovy extractor to Rust (#1101)

* feat(native): port Groovy extractor to Rust

Adds tree-sitter-groovy dependency and native extractor matching
the WASM-side behavior for Groovy symbol, import, and call extraction.

Part of #1071

* fix(groovy): match JS enum_constant fallback and defensive gstring entries

Address Greptile review on PR #1101:

- Rust enum handler now accepts both `enum_constant` and `identifier` children,
  matching the JS source-of-truth in `handleGroovyEnumDecl` (groovy.ts:163).
  Without this, Groovy enums whose grammar emits bare identifier nodes had no
  extracted members in the native engine.
- Add `gstring` defensively to GROOVY_AST_CONFIG (Rust) and GROOVY_AST_TYPES (TS).
  tree-sitter-groovy 0.1.x emits `string_literal` for both quote styles, but
  this keeps both engines resilient to grammar variants.
- Clarify module doc: `juxt_function_call` was previously listed alongside
  features the extractor handles. It is intentionally unhandled (matches JS).
  Tracked in #1108 for adding support to both engines.

* test: fix expected count after merge with main (#1101)

* fix: match JS argument-field fallback order in groovy call extractor (#1101)

* docs(native): clarify member_access dispatch in Groovy extractor (#1101)

Remove member_access from the docstring's list of top-level dispatch
arms — it was never a top-level case in either the JS or Rust extractor.
Both engines only match member_access as a callee sub-node inside
handle_call_expr/handleGroovyCallExpr. The previous wording could
mislead future readers into thinking the arm was missing.

* test(bench): exempt fnDeps depth 3 from regression gate after main merge (#1101)

The merge of #1102 (R) + #1103 (Erlang) + #1100 (Solidity) into the
Groovy branch expanded the self-build benchmark graph far enough that
fnDeps depth 3 now crosses the 25% gate threshold (+88%, 24.3 → 45.6ms)
on a sub-50ms metric. Same root cause already exempted for depth 1,
depth 5, and Query time in #1113.

Author: carlos-alm

Cargo.lock

@@ -39,6 +39,7 @@ tree-sitter-ocaml = "0.24"
 tree-sitter-julia = "0.23"
 tree-sitter-clojure-orchard = "0.2"
 tree-sitter-erlang = "0.16"
+tree-sitter-groovy = "0.1"
 tree-sitter-r = "1.2"
 tree-sitter-solidity = "1.2"
 rayon = "1"