feat: add project entity usage

[theEvilReaper]

Proposed changes

This pull request updates the backend to use the new project entity in different contexts.

Types of changes

What types of changes does your code introduce to this project?
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• Bugfix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Documentation Update (if none of the other choices apply)

Checklist

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them, don't hesitate to ask. We're here to help! This is simply a reminder of what we are going to look for before
merging your code.

• I have read the CONTRIBUTING.md
• I have added tests that prove my fix is effective or that my feature works
• I have added necessary documentation (if appropriate)

[github-actions]

Test results

 42 files   42 suites   5s ⏱️
 79 tests  67 ✅ 12 💤 0 ❌
237 runs  201 ✅ 36 💤 0 ❌

Results for commit bfc5490.