chore: move git hooks to js

_scripts/git-hooks-pre-commit.js

@@ -0,0 +1,12 @@
+#!/usr/bin/env node
+'use strict';
+
+var Process = require('child_process');
+
+var procOpts = { stdio: 'inherit' };
+var commands = ['npm run fmt', 'npm run lint', 'npm run test'];
+
+for (let cmd of commands) {
+  console.info(`[pre-commit] exec: ${cmd}`);
+  Process.execSync(cmd, procOpts);
+}