Explore support for generating rooms

[oubiwann]

See:
Ondrej Nepozitek:

• https://ondra.nepozitek.cz/blog/42/dungeon-generator-part-1-node-based-approach/
• https://ondrejnepozitek.github.io/ProceduralLevelGenerator/docs/introduction.html
• https://github.com/OndrejNepozitek/ProceduralLevelGenerator
• https://github.com/OndrejNepozitek/ProceduralLevelGenerator/blob/text/extended_paper.pdf
  Chongyang Ma:
• http://chongyangma.com/publications/gl/index.html