refactor: Debug spells from Magical Nights moved into Vanilla

[RobbieNeko]

Purpose of change (The Why)

This way the Magical Nights folder can better avoid being in any future DDA spell effect ports, and anyone testing them with a debug spell can just load up any old world instead of needing a Magical Nights world. Additionally, this was the course of action recommended by Oren.

Describe the solution (The How)

Moves the file from data/mods/Magical_Nights/spells to data/json and also renames it for clarity's sake.

Describe alternatives you've considered

• Create another in-repo mod for them
• Put it in TEST_DATA
• Just leave it be
• Time-travel and put them in a future in-repo Arcana to mess with Chaosvolt

Testing

These are only obtainable via debug menu anyway, and renaming a json file shouldn't cause any issues.

Additional context

Also, we could probably do with an expansion of the debug spells covered in it / a restoration of some of the ones in previous PR's that went missing.

Checklist

Mandatory

• I wrote the PR title in conventional commit format.
• I ran the code formatter.
• I linked any relevant issues using github keyword syntax like closes #1234 in Summary of the PR so it can be closed automatically.
• I've committed my changes to new branch that isn't main so it won't cause conflict when updating main branch later.