feat: Add enum member extraction support across all language extractors

Extends AST parsing to identify and extract individual enum members/cases for better code analysis. Adds enumMemberTypes configuration to each language extractor with language-specific node types (e.g., 'enum_variant' for Rust, 'enum_case' for PHP, 'enum_entry' for Swift/Kotlin). Implements flexible member name resolution supporting both field-based and identifier-based extraction patterns.

src/extraction/languages/c-cpp.ts

@@ -9,6 +9,7 @@ export const cExtractor: LanguageExtractor = {
   interfaceTypes: [],
   structTypes: ['struct_specifier'],
   enumTypes: ['enum_specifier'],
+  enumMemberTypes: ['enumerator'],
   typeAliasTypes: ['type_definition'], // typedef
   importTypes: ['preproc_include'],
   callTypes: ['call_expression'],
@@ -41,6 +42,7 @@ export const cppExtractor: LanguageExtractor = {
   interfaceTypes: [],
   structTypes: ['struct_specifier'],
   enumTypes: ['enum_specifier'],
+  enumMemberTypes: ['enumerator'],
   typeAliasTypes: ['type_definition', 'alias_declaration'], // typedef and using
   importTypes: ['preproc_include'],
   callTypes: ['call_expression'],