feat(frameworks): add Drupal 8/9/10/11 support (#271)

Detects Drupal projects via composer.json drupal/* deps; extracts routes from *.routing.yml (route nodes + references edges to controllers/forms/entity handlers) and Drupal hook implementations from .module/.install/.theme/.inc. Adds yaml/twig as file-level languages and excludes core/contrib by default. Resolves #268.

README.md

@@ -124,7 +124,7 @@ The gains scale with codebase size: on large repos the agent answers from the in
 | **Impact Analysis** | Trace callers, callees, and the full impact radius of any symbol before making changes |
 | **Always Fresh** | File watcher uses native OS events (FSEvents/inotify/ReadDirectoryChangesW) with debounced auto-sync — the graph stays current as you code, zero config |
 | **19+ Languages** | TypeScript, JavaScript, Python, Go, Rust, Java, C#, PHP, Ruby, C, C++, Swift, Kotlin, Dart, Lua, Luau, Svelte, Liquid, Pascal/Delphi |
-| **Framework-aware Routes** | Recognizes web-framework routing files and links URL patterns to their handlers across 13 frameworks |
+| **Framework-aware Routes** | Recognizes web-framework routing files and links URL patterns to their handlers across 14 frameworks |
 | **100% Local** | No data leaves your machine. No API keys. No external services. SQLite database only |
 
 ---
@@ -141,6 +141,7 @@ CodeGraph detects web-framework routing files and emits `route` nodes linked by
 | **Express** | `app.get(...)`, `router.post(...)` with middleware chains |
 | **NestJS** | `@Controller` + `@Get/@Post/...`, GraphQL `@Resolver` + `@Query/@Mutation`, `@MessagePattern`/`@EventPattern`, `@SubscribeMessage` |
 | **Laravel** | `Route::get()`, `Route::resource()`, `Controller@action`, tuple syntax |
+| **Drupal** | `*.routing.yml` routes (`_controller`, `_form`, entity handlers); `hook_*` implementations in `.module`/`.theme`/`.install`/`.inc` |
 | **Rails** | `get '/x', to: 'users#index'`, hash-rocket `=>` syntax |
 | **Spring** | `@GetMapping`, `@PostMapping`, `@RequestMapping` on methods |
 | **Gin / chi / gorilla / mux** | `r.GET(...)`, `router.HandleFunc(...)` |