[tool] chore(tooling): introduce add to project workflow (#186)

[ncarenton]

Context

Integrations team is taking the ownership of the client-python

Proposed changes

Adds a GitHub Actions workflow to automatically add newly opened issues and pull requests to our shared GitHub Project board.

Related issues

• Closes Add the add-to-project workflow #186

Checklist

• I consider the submitted work as finished
• I tested the code for its functionality
• I wrote test cases for the relevant uses case
• I added/update the relevant documentation (either on github or on notion)
• Where necessary I refactored code to improve the overall quality
• For bug fix -> I implemented a test that covers the bug

[mariot]

I can't test it but looks good according to the docs