fix(extraction): index TS/JS generator function declarations and expressions (#1741) (#1743)

Tree-sitter kinds generator_function_declaration / generator_function were
missing from both the wasm and native kernel function-type lists, so
function* / async function* (and const g = function* () {}) produced no
nodes. Add the kinds on both paths and cover TS+JS declaration/expression
forms in extraction tests.

Co-authored-by: Colby McHenry <colbymchenry@users.noreply.github.com>

src/extraction/languages/javascript.ts

@@ -3,7 +3,7 @@ import type { LanguageExtractor } from '../tree-sitter-types';
 import { classifyTsClassMember } from './typescript';
 
 export const javascriptExtractor: LanguageExtractor = {
-  functionTypes: ['function_declaration', 'arrow_function', 'function_expression'],
+  functionTypes: ['function_declaration', 'generator_function_declaration', 'arrow_function', 'function_expression', 'generator_function'],
   classTypes: ['class_declaration'],
   methodTypes: ['method_definition', 'field_definition'],
   // JS `field_definition` ≙ TS `public_field_definition`: plain fields are

src/extraction/languages/typescript.ts

@@ -39,7 +39,7 @@ export function classifyTsClassMember(node: SyntaxNode): 'method' | 'property' {
 }
 
 export const typescriptExtractor: LanguageExtractor = {
-  functionTypes: ['function_declaration', 'arrow_function', 'function_expression'],
+  functionTypes: ['function_declaration', 'generator_function_declaration', 'arrow_function', 'function_expression', 'generator_function'],
   classTypes: ['class_declaration', 'abstract_class_declaration'],
   methodTypes: ['method_definition', 'public_field_definition'],
   classifyMethodNode: classifyTsClassMember,