As a user, I would like to customize the modal displayed when a 'Create Project' button is clicked in the UI.

Acceptance criteria

• add an extension point so plugin creators can provide their own "Create Project" modal
• the console should implement this extension point using the "useModal" hook from the dynamic plugin SDK
• update docs with this extension point.
• add a a custom modal to the demo plugin for testing. The modal will create a project and quota for that project.