Reorganize build outputs to centralized binaries directory

- Move stub outputs from build/stub to binaries/stub
- Add binaries/socket-node for custom Node binaries
- Update pkg.json configuration for new paths

Author: jdalton

.config/pkg.json

@@ -7,7 +7,7 @@
     "socket-pnpm": "dist/pnpm-cli.js",
     "socket-yarn": "dist/yarn-cli.js"
   },
-  "node": "/Users/jdalton/projects/socket-cli/build/tiny-node/node-yao-pkg/out/Release/node",
+  "node": "/Users/jdalton/projects/socket-cli/build/socket-node/node-yao-pkg/out/Release/node",
   "bytecode": false,
   "targets": [
     "node24-macos-arm64",
@@ -17,7 +17,7 @@
     "node24-win-arm64",
     "node24-win-x64"
   ],
-  "outputPath": "build/stub",
+  "outputPath": "binaries/stub",
   "assets": [
     "dist/**/*",
     "requirements.json",

scripts/build/build-stub.mjs

@@ -19,7 +19,7 @@ const __filename = fileURLToPath(import.meta.url)
 const __dirname = dirname(__filename)
 const ROOT_DIR = join(__dirname, '../..')
 const BUILD_DIR = join(ROOT_DIR, 'build')
-const STUB_DIR = join(BUILD_DIR, 'stub')
+const STUB_DIR = join(ROOT_DIR, 'binaries', 'stub')
 const DIST_DIR = join(ROOT_DIR, 'dist')
 const PKG_CONFIG = join(ROOT_DIR, '.config', 'pkg.json')
 
@@ -32,7 +32,7 @@ const PKG_CONFIG = join(ROOT_DIR, '.config', 'pkg.json')
  * 3. Ensure custom Node.js binary exists in pkg cache
  * 4. Use yao-pkg to create self-contained executable
  *
- * Output: build/stub/socket-{platform}-{arch}[.exe]
+ * Output: binaries/stub/socket-{platform}-{arch}[.exe]
  */
 export async function buildStub(options = {}) {
   const {