feat: use project.slug instead or project.id on routes

[ttebify]

Description

Please include a summary of the changes and the related issue. Please also include relevant motivation and context. List any dependencies that are required for this change.

Replace all the project specific routes with slug instead of routes. Attempt Fix #195

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

How Has This Been Tested?

Please describe the tests that you ran to verify your changes. Provide instructions so we can reproduce. Please also list any relevant details for your test configuration

1. Test the project routes sequentially to ensure successful navigation through each of them.
2. Test on the checkSlugOrNameAvailability function with different values to ensure that it returns the expected result.

Checklist:

• My code follows the style guidelines of this project
• I have performed a self-review of my code
• I documented my code, particularly in hard-to-understand areas
• My changes generate no new warnings

[dahal]

Amazing work on this PR @ttebify 🎉 👏🏼

[ttebify]

I'm happy to contribute 💙