cleanup: Remove unused schematic files

- Remove mcu.kicad_sch (not referenced in project)
- Remove PWR.kicad_sch (not referenced in project)
- All functionality is now in main Laser CANbus Toolhead.kicad_sch
- Simplifies project structure and eliminates confusion

Laser CANbus Toolhead.kicad_pro

@@ -125,7 +125,7 @@
         "max_error": 0.005,
         "min_clearance": 0.0,
         "min_connection": 0.0,
-        "min_copper_edge_clearance": 0.5,
+        "min_copper_edge_clearance": 0.2,
         "min_groove_width": 0.0,
         "min_hole_clearance": 0.25,
         "min_hole_to_hole": 0.25,
@@ -713,5 +713,7 @@
       "Root"
     ]
   ],
-  "text_variables": {}
+  "text_variables": {
+    "PROJEKT_REV": "0.3"
+  }
 }