Improves tree and ground tile appearance

Refactors tree spawning and rendering:
- Adds seasonal color variations for trees via scripts.
- Introduces `ColorStorage` to manage tree and grass colors
- Removes unused code from tree spawning logic.
- Adjusts ground tile color for better visual appeal.
- Hides debug text on ground tiles.

stages/Test3D/Test3d.tscn

@@ -740,7 +740,7 @@ script = ExtResource("2_sdmks")
 transform = Transform3D(1, 0, 0, 0, 1, -1.49012e-07, 0, 1.19209e-07, 1, 0.0410548, 0.237644, 3.45114)
 projection = 1
 current = true
-size = 4.0
+size = 3.0
 near = 0.005
 far = 100.0
 
@@ -772,7 +772,7 @@ draw_pass_1 = SubResource("QuadMesh_hvb1l")
 [node name="OmniLight3D" type="OmniLight3D" parent="SubViewportContainer/SubViewport/VFX/Fire"]
 transform = Transform3D(1, 0, 0, 0, 1, 0, 0, 0, 1, -0.000509977, 0.121094, -0.00151992)
 light_color = Color(0.89, 0.461613, 0.2136, 1)
-light_energy = 0.668778
+light_energy = 0.802091
 light_indirect_energy = 1.084
 light_volumetric_fog_energy = 3.764
 light_size = 0.105