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.

utilities/FileUtilitiesClass.gd

@@ -0,0 +1,31 @@
+extends Node
+class_name FileUtilitiesClass 
+
+func get_file_paths_by_extension(directoryPath: String, extension: String, recursive: bool = false) -> Array:
+    
+	var dir : DirAccess = DirAccess.open(directoryPath)
+	
+	if !dir:
+		printerr("Warning: could not open directory: ", directoryPath)
+		return []
+    
+	if dir.list_dir_begin() != OK:
+		printerr("Warning: could not list contents of: ", directoryPath)
+		return []
+
+	var filePaths := []
+	var fileName := dir.get_next()
+
+	while fileName != "":
+		if dir.current_is_dir():
+			if recursive:
+				var dirPath : String = dir.get_current_dir() + "/" + fileName
+				filePaths += get_file_paths_by_extension(dirPath, extension, recursive)
+		else:
+			if fileName.get_extension() == extension:
+				var filePath : String = dir.get_current_dir() + "/" + fileName
+				filePaths.append(filePath)
+    
+		fileName = dir.get_next()
+    
+	return filePaths