Missing support for Map configuration values

### Describe the bug

Recaf-provided option "Extension to language map" uses an unsupported value type.

### To Reproduce

obvious

### Exception

n/a

### Screenshots

<img width="355" height="96" alt="Image" src="https://github.com/user-attachments/assets/3526d81d-01bc-4f6d-9a8c-755a5eb32cb5" />
