refactor(mods/Monster_Girls): migrate to typescript

[scarf005]

Checklist

Required

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

Purpose of change

migrate the python script to typescript for easier management.

Describe the solution

migrated them to typescript using valibot (rest of scripts using zod will also be migrated to valibot because it's fast and lightweight)

Describe alternatives you've considered

cry

Testing

will write a test later, marking it as draft for now.

• scripts are able to update existing mods

Additional context

we do need to ditch the homebrew formatter if we want to do some serious scripting