feat: Introduce core game managers and main scene, implementing player UI for board, actions, and power-ups.

scenes/main.tscn

@@ -961,6 +961,18 @@ grow_horizontal = 2
 grow_vertical = 2
 texture = ExtResource("9_6gcb6")
 
+[node name="PlayerBoardLabel" type="Label" parent="." unique_id=341385584]
+anchors_preset = 4
+anchor_top = 0.5
+anchor_bottom = 0.5
+offset_left = 217.0
+offset_top = -20.0
+offset_right = 257.0
+offset_bottom = 3.0
+grow_vertical = 2
+theme_override_font_sizes/font_size = 32
+text = "X0"
+
 [node name="PowerUpBar" type="PanelContainer" parent="." unique_id=1775378146]
 anchors_preset = 4
 anchor_top = 0.5
@@ -9415,6 +9427,7 @@ offset_bottom = 24.0
 texture = ExtResource("10_my1qp")
 
 [node name="MessageBar" type="PanelContainer" parent="." unique_id=142729129]
+visible = false
 anchors_preset = 2
 anchor_top = 1.0
 anchor_bottom = 1.0