Add "public" metadata section in project's metadata and use it for display name

[JAORMX]

Summary

This adds a public metadata key in the project's metadata. This will hold whatever is fine
to display for the project in an API/UI. The first two instances added there are the description
(previously unused) and the "display name".

The display name is always displayed and defaulted to the project's name. It is also defaulted
in all new projects.

It should show up as follows:

$ minder project list -o json
WARNING: Running against a test environment (127.0.0.1) and may not be stable
{
  "projects": [
    {
      "projectId": "73460926-70c3-4d7d-bf34-1c224a1ec4d4",
      "name": "jaormx",
      "createdAt": "2024-03-18T16:18:19.521054Z",
      "updatedAt": "2024-03-18T16:18:19.521054Z",
      "displayName": "jaormx"
    }
  ]
}

Adding the ability to update a project will come in a subsequent PR.

Change Type

Mark the type of change your PR introduces:

• Bug fix (resolves an issue without affecting existing features)
• Feature (adds new functionality without breaking changes)
• Breaking change (may impact existing functionalities or require documentation updates)
• Documentation (updates or additions to documentation)
• Refactoring or test improvements (no bug fixes or new functionality)

Testing

Outline how the changes were tested, including steps to reproduce and any relevant configurations.
Attach screenshots if helpful.

Review Checklist:

• Reviewed my own code for quality and clarity.
• Added comments to complex or tricky code sections.
• Updated any affected documentation.
• Included tests that validate the fix or feature.
• Checked that related changes are merged.

[coveralls]

coverage: 46.665% (+0.06%) from 46.601%
when pulling 3d9f432 on display-name
into 8a0bc3f on main.