Backend updates to case formatting and to the Anime guide

[FonduemangVI]

Pull request

Purpose
Update Sonarr area with standard naming convention as per guidelines and updates to the CF Sonarr Anime guide
Updated redirects with new formatting and all md files and links in md files

Open Questions and Pre-Merge TODOs
Check all boxes as they are completed

• Use github checklists. When solved, check the box and explain the answer.

Learning
If you're adding a new Custom Format make sure you follow the Radarr/Sonarr Custom Format (JSON) Guidelines.

Requirements
Check all boxes as they are completed

• These changes meet the standards for contributing.
• I have read the code of conduct.

[TRaSH-]

We can't merge this before we have some more info that i've reported here mkdocs/mkdocs-redirects#43