Adds new optional stages for the project.project model.
Previously projects would stay dormant when they were finished, we can
now define stages for those projects to determine where a stage is in
it's lifecycle.
Also adds some small changes to the project itself, such as adding tags.
Closesodoo/odoo#73648
Task ID: 2581575
Related: odoo/upgrade#2646
Signed-off-by: LTU-Odoo <IT-Ideas@users.noreply.github.com>
