Allow users to add a project from a workspace

[gtsiolis]

Problem to solve

Re-posting from #10137:

Currently, when a new user signs up the default permissions for the GitHub provider does not include 🅰️ repositories across GitHub organizations or 🅱️ private repositories, which can confuse users.

For Workspaces v. Projects clarification, see also #10139.

See relevant discussion (internal).

Proposal

TBD (To be discussed)

In the meantime, we could allow users to add a project from a workspace, listing all project benefits, as well as reading existing prebuilds configuration, etc.

[stale]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.