fix(groovy): emit inherits/implements edges for extends/implements

[Synvoya]

Summary

The Groovy extractor silently drops every extends and implements relationship. contains, methods, imports, and calls all work — but class inheritance produces no edges.

Root cause

tree-sitter-groovy exposes inheritance through the same grammar shape as tree-sitter-java:

class_declaration <superclass=superclass, interfaces=super_interfaces>
  superclass        -> extends + type_identifier
  super_interfaces  -> implements + type_list -> type_identifier

But the inheritance-emitting block in _extract_generic is gated on config.ts_module == "tree_sitter_java". Groovy (ts_module="tree_sitter_groovy") never enters it — it was the only class-based JVM language in the file without an inheritance handler (Java, Kotlin, Scala, C#, Swift, C++, PHP, Python all have one).

Fix

Widen the gate to include tree_sitter_groovy. The existing _emit_java_parent_type / _java_collect_type_refs path consumes the identical node shapes verbatim — no new handler needed.

-            if config.ts_module == "tree_sitter_java":
+            if config.ts_module in ("tree_sitter_java", "tree_sitter_groovy"):

Verification

• Added a base class + interface to the Groovy fixture and two regression tests (extends -> inherits, implements -> implements).
• pytest tests/test_languages.py -> 269 passed, 13 skipped (was 267 + my 2 new); Java inheritance tests unaffected (the shared path is reused, not changed).
• ruff check --config pyproject.toml -> clean.

Before / after

class UserService extends Base implements Repo {}

• before: only contains edges
• after: inherits UserService->Base, implements UserService->Repo

[safishamsi]

Merged into v8 as 64a6093 (your authorship). Confirmed the Java handler consumes the Groovy superclass/super_interfaces node shapes verbatim — extends→inherits and implements→implements both emit, Java inheritance tests unaffected. Clean one-line gate reuse. Full suite green. Ships next release.