Update Slack GitHub Action to v3.0.1 and add .claude and .codex to .gitignore

Author: danias

.github/workflows/release.yml

@@ -240,7 +240,7 @@ jobs:
 
       - name: Send Slack notification
         if: env.SLACK_WEBHOOK_URL != ''
-        uses: slackapi/slack-github-action@v2.1.1
+        uses: slackapi/slack-github-action@v3.0.1
         with:
           webhook: ${{ env.SLACK_WEBHOOK_URL }}
           webhook-type: incoming-webhook

.gitignore

@@ -19,3 +19,6 @@ target
 #  and can be added to the global gitignore or merged into this file.  For a more nuclear
 #  option (not recommended) you can uncomment the following to ignore the entire idea folder.
 #.idea/
+
+.claude
+.codex