D9 Projects Content Types - Implement Proposals

We will need to implement the following elements for this content type:

• Full view
• Form
• Top level Views page

The full view of a proposal page can be viewed here:

https://projects.eclipse.org/proposals/eclipse-opensmartclide

The code for the Drupal 7 implementation of the SimRel can be found here:

https://gitlab.eclipse.org/eclipsefdn/it/webdev/drupal/pmi/-/tree/7.x-1.x/projects/project_proposals