refactor(dev-infra): use conventional-commits-parser for commit parsing (#41286)

Use conventional-commits-parser for parsing commits for validation, this is being done
in anticipation of relying on this parser for release note creation.  Unifying how commits
are parsed will provide the most consistency in our tooling.

PR Close #41286

dev-infra/commit-message/restore-commit-message/commit-message-draft.ts

@@ -0,0 +1,30 @@
+/**
+ * @license
+ * Copyright Google LLC All Rights Reserved.
+ *
+ * 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 {existsSync, readFileSync, unlinkSync, writeFileSync} from 'fs';
+
+/** Load the commit message draft from the file system if it exists. */
+export function loadCommitMessageDraft(basePath: string) {
+  const commitMessageDraftPath = `${basePath}.ngDevSave`;
+  if (existsSync(commitMessageDraftPath)) {
+    return readFileSync(commitMessageDraftPath).toString();
+  }
+  return '';
+}
+
+/** Remove the commit message draft from the file system. */
+export function deleteCommitMessageDraft(basePath: string) {
+  const commitMessageDraftPath = `${basePath}.ngDevSave`;
+  if (existsSync(commitMessageDraftPath)) {
+    unlinkSync(commitMessageDraftPath);
+  }
+}
+
+/** Save the commit message draft to the file system for later retrieval. */
+export function saveCommitMessageDraft(basePath: string, commitMessage: string) {
+  writeFileSync(`${basePath}.ngDevSave`, commitMessage);
+}