ImmersiveRPG Devlog #7 NPC shooting and dynamic navmesh

Let's make an Immersive RPG in Godot devlog #7

Updates can be found at:
https://immersiverpg.com
https://github.com/ImmersiveRPG

This devlog includes:
1. NPCs shooting targets
2. Changed navmeshes to be generated from objects at runtime in a thread
3. Heart Rate tracker
4. Light switches
5. Moonlight based on moon phase
6. Trip wire
7. Street sign
8. Billboard with ladder
9. Car terrain based traction and skid marks
10. Freeway overpass with soldier patrols