- Add LoMinesPlaceholderExpansion with placeholders for mines and player stats
- Available placeholders: mine_<name>_(name|blocks|total|percent|world|remaining|resettime)
- Player placeholders: player_(blocksmined|minesreset|playtime|rank)
- Global: lomines_count for total mines
- Update IntegrationManager to register/unregister expansion
- Remove Oraxen and ItemsAdder integration checks
Expansion auto-registers on initAll() and unregisters on shutdown()
- Change base package from com.loki to dev.loki across all Java files
- Update plugin.yml main class path
- Fix ConfigParseException imports in test files
- Update build.gradle.kts relocate patterns
- Add missing imports in ConfigLoaderTest.java
- Update TODO.md with current status
BREAKING CHANGE: Package namespace changed from com.loki to dev.loki
