API Features

API Features:
- [X] Plugin manager
- [X] Service Manager
- [x] World **partial**
- [X] Entities #3 **need review**
- [X] Text
- [x] Events #2
- ~Scoreboard~ **Future version**
- ~Effects~ **Future version**
- [x] Blocks **partial**
- [x] Items **partial**
- [ ] Commands
- ~Profiles~ **Future version**
- [X] Registry
- [x] Expose AdapterHelper (**possible feature**)
  ...
