feat: initialize gomdown-helper with yt-dlp transfer flow

tsconfig.tsbuildinfo

@@ -0,0 +1 @@
+{"root":["./src/background/index.ts","./src/config/main.tsx","./src/content/index.ts","./src/history/main.tsx","./src/lib/downloadintent.ts","./src/lib/history.ts","./src/lib/mediacapture.ts","./src/lib/mediastore.ts","./src/lib/nativehost.ts","./src/lib/settings.ts","./src/popup/main.tsx","./manifest.config.ts","./vite.config.ts"],"version":"5.9.3"}