feat(dev-infra): create commit-message validation script/tooling (#36117)

PR Close #36117

dev-infra/cli.ts

@@ -6,7 +6,11 @@
  * Use of this source code is governed by an MIT-style license that can be
  * found in the LICENSE file at https://angular.io/license
  */
+import {readFileSync} from 'fs';
+import {join} from 'path';
 import {verify} from './pullapprove/verify';
+import {validateCommitMessage} from './commit-message/validate';
+import {getRepoBaseDir} from './utils/config';
 
 const args = process.argv.slice(2);
 
@@ -16,6 +20,12 @@ switch (args[0]) {
   case 'pullapprove:verify':
     verify();
     break;
+  case 'commit-message:pre-commit-validate':
+    const commitMessage = readFileSync(join(getRepoBaseDir(), '.git/COMMIT_EDITMSG'), 'utf8');
+    if (validateCommitMessage(commitMessage)) {
+      console.info('√  Valid commit message');
+    }
+    break;
   default:
     console.info('No commands were matched');
 }