build: Add GH action to label community issues automatically

[merelcht]

Description

Add a GH action to automatically label issues created by anyone outside of the team as "Community".

Development notes

This is a copy of the action on kedro https://github.com/kedro-org/kedro/blob/main/.github/workflows/label-community-issues.yml

See an example build on kedro: https://github.com/kedro-org/kedro/actions/runs/11662168547/job/32467983956

Checklist

• [ ] Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• [ ] Updated the documentation to reflect the code changes
• [ ] Added a description of this change in the relevant RELEASE.md file
• [ ] Added tests to cover my changes
• [ ] Received approvals from at least half of the TSC (required for adding a new, non-experimental dataset)