Exposes get_rid() function for scripting.
Adds configuration warning when obstacle is used with not intended static body parent.
(cherry picked from commit 001d89223f)
Fixes NavigationObstacle2D/3D reporting a 'get_global_transform: Condition "!is_inside_tree()" error when estimating the agent radius.
The collisionshapes that are lower in the SceneTree order than the obstacle node are not loaded in the SceneTree yet so the global_transform function fails.
Also adds warning message when this happens.
(cherry picked from commit cc707412e9)
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.
