feat: Introduce core player movement manager with grid-based movement, player pushing mechanics, and initial bot control and strategic planning.

scripts/bot_strategic_planner.gd

@@ -304,6 +304,24 @@ func _check_spiral_cell(x: int, z: int, tile_types: Array, result_array: Array):
 	if _normalize_tile(item) in tile_types:
 		result_array.append(Vector2i(x, z))
 
+func find_nearest_roaming_tekton() -> Node3D:
+	"""Find the nearest Tekton that isn't carried and is on the grid."""
+	var tektons = actor.get_tree().get_nodes_in_group("Tektons")
+	var nearest_tekton = null
+	var min_dist = 999999.0
+	
+	for tekton in tektons:
+		if not is_instance_valid(tekton): continue
+		if tekton.get("is_carried") or tekton.get("is_static_turret"): continue
+		if tekton.get("is_recovering"): continue # Cannot target shrinking/recovering Tektons
+		
+		var dist = actor.global_position.distance_to(tekton.global_position)
+		if dist < min_dist:
+			min_dist = dist
+			nearest_tekton = tekton
+			
+	return nearest_tekton
+
 # =============================================================================
 # Movement Strategy
 # =============================================================================