Update PCB design

-> Add pad
-> Update netclass
-> Change to Two sided design

SmartWatch.kicad_prl

@@ -1,6 +1,6 @@
 {
   "board": {
-    "active_layer": 5,
+    "active_layer": 2,
     "active_layer_preset": "",
     "auto_track_width": true,
     "hidden_netclasses": [],
@@ -52,7 +52,7 @@
       "shapes"
     ],
     "visible_layers": "ffffffff_ffffffff_ffffffff_fffffdff",
-    "zone_display_mode": 0
+    "zone_display_mode": 1
   },
   "git": {
     "integration_disabled": false,
@@ -90,16 +90,16 @@
       9
     ],
     "col_widths": [
-      0,
-      0,
-      0,
-      0,
-      0,
-      0,
-      0,
-      0,
-      0,
-      0
+      71,
+      76,
+      102,
+      84,
+      90,
+      107,
+      92,
+      88,
+      47,
+      1733
     ],
     "custom_group_rules": [],
     "expanded_rows": [],