Proposal: Add Github Actions workflow to auto-close stale issues

[Septa2112]

Currently, WAMR does not have an automated workflow to close stale issues. This can lead to backlog of old and inactive issues, making it harder to manage the repository.

I would like to add a Github Actions workflow that automatically marks issues as stale after a certain period of inactivity (e.g., 60 days) and closes them if no further updates are made (e.g., after another 7 days).

Benefits

• Keep the issue list focused on active and relevant topics
• Reduces the manual workload for maintainers.
• Encourages contributors to follow up on issues they care about.

Additional Notes

• The time limits and exempted labels can be discussed.
• This workflow would only target issues.

Possible implementation

We could use the actions/stale GitHub Action.

[lum1n0us]

One additional requirement is that if an issue is labeled with help wanted, do not close it.