feat: Add Pascal/Delphi language support with DFM/FMX extraction

Implements tree-sitter-based extraction for Pascal/Delphi source files
(.pas, .dpr, .dpk, .lpr) and a custom regex-based DfmExtractor for
form files (.dfm, .fmx). Covers classes, records, interfaces, methods,
properties, fields, enums, constants, type aliases, uses-imports,
visibility sections, inheritance, call extraction, and DFM component
hierarchies with event handler references.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

src/types.ts

@@ -74,6 +74,7 @@ export type Language =
   | 'dart'
   | 'svelte'
   | 'liquid'
+  | 'pascal'
   | 'unknown';
 
 // =============================================================================
@@ -519,6 +520,13 @@ export const DEFAULT_CONFIG: CodeGraphConfig = {
     '**/*.svelte',
     // Liquid (Shopify themes)
     '**/*.liquid',
+    // Pascal / Delphi
+    '**/*.pas',
+    '**/*.dpr',
+    '**/*.dpk',
+    '**/*.lpr',
+    '**/*.dfm',
+    '**/*.fmx',
   ],
   exclude: [
     // Version control