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.

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