Display API Documentation (Swagger UI)

[brunobuddy]

Description

This PR adds the API Documentation feature to Manifest.

How can it be tested?

• Go to packages/core/manifest
• Run npm run start:dev
• You should see the link to the API doc in the console
• Click on the link to see it and play around with the different endpoints.

run tests manually

npm run test
npm run test:e2e

⚠️ @SebConejo to add style to the Api doc you can go edit packages/core/manifest/src/main.ts line 59 for custom css.

Check list before submitting

The doc will be updated after publish

• I have performed a self-review of my code (no debugs, no commented code, good naming, etc.)
• I wrote the relative tests
• I updated the documentation if necessary
• This PR is wrote in a clear language and correctly labeled