refactor: rewrite entire Source architecture#2545

Draft

HoloTheDrunk wants to merge 3 commits intoiTowns:masterfrom

HoloTheDrunk:new_source_architecture

Commits on Apr 1, 2025

feat: new sources base
HoloTheDrunk
committed

Commits on May 21, 2025

feat: use Three.js Loader and create capabilities
HoloTheDrunk
committed

Commits on Jun 3, 2025

feat: add TmsSource docs and cleanup
HoloTheDrunk
committed