fix: exclude detector.js from TypeScript compilation

Author: tahmarrrr23

package.json

@@ -1,6 +1,6 @@
 {
   "name": "@lycorp-jp/tappy",
-  "version": "0.1.0",
+  "version": "0.1.2",
   "description": "Tappy analyzes the size of buttons, links, and other interactive elements on smartphone web screens and displays tap success rates.",
   "repository": {
     "type": "git",
@@ -28,7 +28,7 @@
     "dist"
   ],
   "scripts": {
-    "build": "pnpm clean && tsc",
+    "build": "pnpm clean && tsc && cpx -C src/browser/** dist/browser/",
     "clean": "rimraf dist",
     "lint": "biome check",
     "test": "vitest run"