Backports features and bugfixes from current Godot 4.0 to 3.5 and brings functions and codebase of both version largely in sync to make tutorials more compatible and future backports easier.
Utility functions for NavigationServer2D/3D to find missing RID information when working with Server API directly. e.g. from map to regions and agents, from agent or region to map, from region to map and agents and so on ....
Requirement to work with NavigationServer API exklusive without SceneTree nodes and when juggling agents and regions between multiple navigation maps.
(cherry picked from commit 371054e3e5)
Change the entire navigation system.
Remove editor prefix from nav mesh generator class. It is now used for baking
at runtime as well.
Navigation supports obstacle avoidance now with the RVO2 library.
Nav system will also automatically link all nav meshes together to form one
overall complete nav map.
