Added job component and queue system

- Introduced a new JobComponent and JobQueue to manage jobs in the game.
- Created two new jobs: DigJob and InfectJob with their respective scripts.
- Updated CrystalGlowComponent, FreeCameraComponent, MushroomGlowComponent, WaterEffectComponent to improve logging messages.
- Adjusted camera movement limits in FreeCameraGameCameraComponent for better control.
- Added FiniteStateMachine class for managing states of entities.
- Implemented GlowingIdle state as an example of using the state machine.
- Included a utility function to fetch file paths by extension from a directory.

entities/scripts/state.gd

@@ -0,0 +1,18 @@
+@icon("res://resources/icons/fsm.png")
+extends Node
+class_name State
+
+signal state_transition
+
+func enter(_msg : Dictionary = {}) -> void:
+	pass
+	
+func exit() -> void :
+	pass
+	
+func update(_delta : float) -> void:
+	pass
+
+func physics_update(_delate : float) -> void:
+	pass
+