Adds basic camp generation and placement

Adds basic camp generation and placement logic to the map generation process.

It attempts to place the camp in a valid location, avoiding paths and water bodies. It also sets the player's spawn point to the center of the generated camp, including some basic camp props like a tent, campfire, and bed.

Additionally, vegetation spawning is now dependent on the `should_spawn_*` methods of the `CellDataResource`, allowing more control over what spawns where.

Config/Globals.gd

@@ -5,6 +5,8 @@ var map_height: int = 200
 var map_width: int = 200
 var _map_data: Array
 var _biome_data: Dictionary = {}
+var _camp_data: Dictionary = {}
+var spawn_point: Vector3 = Vector3(0, 0, 0)
 
 # Property for map_data with logging
 var map_data: Array: