Live update map

[Danielv123]

Resolves #14 once completed

• [x] Make map render entities when built
• [ ] Make map render entities on chunk generation
• [x] Make map render tiles on startup
• [ ] Make map render tiles on changes in game
• [ ] Make map render tiles on chunk generation
• [ ] Make map remove entities when deconstructed
• [ ] Use true entity sizes

[Danielv123]

[Danielv123]

Merging this as it includes crucial changes to get a build for testers.