Write a new MVP repo.sourcify.dev frontend that does not use repoV1

[kuzdogan]

We want to move away from using repoV1 completely and the only component that will be left using it will be repo.sourcify.dev. Modify it to use the new endpoints can be cumbersome because it's essentially a block-box for us (written in PHP) that sits on top of a filesystem and just gives a UI for exploring them. I think instead we can come up with a simple UI quickly that uses the /files/any endpoints and displays the source codes of each file.

The emphasis has to be made on it being a simple solution 😄 We just need an MVP and can iterate on it later.

### Tasks
- [ ] Remove the code related to path sanitization as it's no longer required
- [ ] TBD