Implements procedural ground tile generation

Adds procedural ground tile generation with chunking for improved performance.

Includes:
- Ground tile entity with debug text and cell information
- Grass and tree placement based on cell data
- Ground shader for visual representation
- Chunk loading and unloading system based on player position

Entities/GroundTile/ground_tile.gd

@@ -1,26 +1,29 @@
+# GroundTile.gd
+class_name GroundTile
 extends Node3D
 
-@onready var debug_text: Label = $DebugText/DebugTextLabel
-
+@onready var debug_text: Label = $DebugText/DebugTextViewport/DebugTextLabel
 var grid_x: int
 var grid_z: int
-var cell_info: CellDataResource
+var cell_info: CellDataResource = null:
+	set(value):
+		cell_info = value
+		if cell_info != null:
+			cell_info_updated.emit(value)
+			
+var rng: RandomClass = RandomClass.new()
+
+signal cell_info_updated(value)
 
 func _ready() -> void:
 	if cell_info != null:
 		update_text_label()
+		rng.set_seed(cell_info.cell_seed)
 
 func set_grid_location(x, z) -> void:
 	grid_x = x
 	grid_z = z
 	cell_info = MapData.get_map_data(grid_x, grid_z)
 
-	var debug_dict = {}
-	if cell_info.get_script():
-		var script_properties = cell_info.get_script().get_script_property_list()
-		for prop in script_properties:
-			debug_dict[prop.name] = cell_info.get(prop.name)
-	Log.pr(debug_dict)
-
 func update_text_label() -> void:
 	debug_text.text = str(grid_x) + ', ' + str(grid_z) + ', ' + str(cell_info.cell_seed)