fix(coding-agent): fix standalone binary WASM loading on Linux, fixes #784

- Import photon-node from ESM entry point (photon_rs_bg.js) instead of CJS
  entry, allowing Bun to embed WASM in compiled binaries
- Add photon.d.ts for TypeScript support of ESM entry
- Add scripts/build-binaries.sh for local binary builds
- Simplify GitHub workflow to use the build script
- Add binaries/ to gitignore

packages/coding-agent/tsconfig.build.json

@@ -5,5 +5,5 @@
 		"rootDir": "./src"
 	},
 	"include": ["src/**/*.ts"],
-	"exclude": ["node_modules", "dist", "**/*.d.ts", "src/**/*.d.ts"]
+	"exclude": ["node_modules", "dist"]
 }