Add GitHub action to auto-close inactive issues

[santoshyadavdev]

Adds a new GitHub action to automatically close issues older than 6 months due to inactivity and comment on them every Friday at 12pm CET.

• Scheduling: Configures the action to run on a schedule, specifically every Friday at 12pm CET, using a cron job.
• Issue Handling: Utilizes the actions/stale action to automatically mark issues as stale after 180 days of inactivity and then immediately close them.
• Messaging: Before closing, posts a comment on the stale issues and pull requests to inform contributors of the closure due to inactivity, with separate messages for issues and pull requests.

---

For more details, open the Copilot Workspace session.

[nx-cloud[bot]]

☁️ Nx Cloud Report

CI is running/has finished running commands for commit 3ef6942e5fff881700c99a3bf160b33c4b0d1f68. As they complete they will appear below. Click to see the status, the terminal output, and the build insights.

📂 See all runs for this CI Pipeline Execution

---

✅ Successfully ran 1 target

- [`nx run-many --target=build --all`](https://cloud.nx.app/runs/tdzGSse5l1?utm_source=pull-request&utm_medium=comment)

---

Sent with 💌 from NxCloud.