- Register .groovy and .gradle in CODE_EXTENSIONS, _DISPATCH, and collect_files
- Add _GROOVY_CONFIG (reuses Java import handler)
- Add regex-based _extract_spock_fallback for Spock spec files where
tree-sitter-groovy wraps the body in ERROR nodes due to def-string methods
- _is_spock_file detects via regex scan (def "...") instead of node-label
heuristic, avoiding false negatives on classes whose name differs from stem
- Fallback retains only file node + import edges from tree-sitter pass to
prevent orphaned constructor/method nodes
- Add tree-sitter-groovy>=0.1.2 dependency
- Add 11 tests covering plain Groovy and Spock paths, including apostrophe
in feature method names