286 add to favourites endpoint

[refokcer]

dev

Summary of issue

Task: Create a MediatR handler that allows users to add a Streetcode to their favourite list. Steps:

1. Create a AddStreetcodeToFavouritesCommand.
2. Implement a AddStreetcodeToFavouritesHandler.
3. Store the favourite list in the browser's localStorage.
4. Create a controller action to handle adding to favourites.

Summary of change

1. Created AddStreetcodeToFavouritesCommand.
2. Implemented AddStreetcodeToFavouritesHandler.
3. Stored the favourites list in localStorage.
4. Created a controller action to handle adding to favourites.
5. Covered with unit tests

CHECK LIST

• [ ] СI passed
• [ ] Сode coverage >=50%
• [ ] PR is reviewed manually again (to make sure you have 100% ready code)
• [ ] All reviewers agreed to merge the PR
• [ ] PR meets all conventions

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
90.5% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud