### Added
- Added `config reload` command for dynamic configuration updates
- Added `refreshSkinOnJoin` config option (see [wiki](https://github.com/Suiranoil/SkinRestorer/wiki/Configuration#refreshskinonjoin))
- Implemented caching for skin providers
- Added provider configurations (see [wiki](https://github.com/Suiranoil/SkinRestorer/wiki/Configuration#providers))
- Added username and url validation for requests
### Fixed
- Fixed old skin directory migration not working
- Prevented overwriting existing skin files during migration