chore: bump version to 1.2.0

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@colbymchenry/codegraph",
-  "version": "1.1.6",
+  "version": "1.2.0",
   "description": "Supercharge AI coding agents with semantic code intelligence — surgical context, fewer tool calls, faster answers. 100% local.",
   "main": "dist/index.js",
   "types": "dist/index.d.ts",