Update Documentation & Readme

[Zoriot]

• Navigation Documentation is bit outdated and lacks information + screenshots!
  • We should also have a simular structure then for Generator
• Commands & Permission Parts doesn't contain Link to command
• Block Palette GUI doesn't contain images
• Road Gen contains broken image
• Tree Gen contains not many infos + no images
• (Update Field Gen Docs if that's working)
• Update KML Docs (No images, only a few infos)
• Update that stuff below also on our wiki - we share some stuff with that (Imrpove for 2.0.0-alpha pull request)
• Update Readme
  • No Icon for Multi-Language Support (PLANNED)
  • Outdated Components Image
  • Change SchematicBrush to SchematicBrushReborn
  • Move planned Features only to github issues (or remove completly)
  • Point out the unique selling point of the plugin

[Redstoner507]

Hey, I'll also try that