Use a different ethernet jack; add 3.3V power plane

cm4-nrf54.kicad_dru

@@ -0,0 +1,6 @@
+(version 1)
+
+(rule "dp clearance"
+(constraint clearance (min 1.2mm))
+(condition "A.inDiffPair('*') && A.Type == 'Track' && B.Type == 'Zone' ")
+)

cm4-nrf54.kicad_prl

@@ -1,6 +1,6 @@
 {
   "board": {
-    "active_layer": 0,
+    "active_layer": 5,
     "active_layer_preset": "",
     "auto_track_width": true,
     "hidden_netclasses": [],
@@ -49,7 +49,7 @@
       "conflict_shadows",
       "shapes"
     ],
-    "visible_layers": "00000000_00000000_0000000a_aaaaaaef",
+    "visible_layers": "00000000_00000000_0000000a_aaaaaaaf",
     "zone_display_mode": 0
   },
   "git": {

cm4-nrf54.kicad_pro

@@ -112,7 +112,7 @@
           ""
         ],
         [
-          "silk_edge_clearance|87000000|103850000|00000000-0000-0000-0000-0000613f45bd|7d3e9b0d-05ca-4afe-a9df-d9580a55dd34",
+          "silk_edge_clearance|87000000|104110000|00000000-0000-0000-0000-0000613f45bd|c0859927-58a3-4320-b950-a51bf7d447f7",
           ""
         ],
         [
@@ -124,7 +124,7 @@
           ""
         ],
         [
-          "silk_edge_clearance|87000000|88150000|00000000-0000-0000-0000-0000613f45bd|58c515ae-1e15-440d-bc6c-ac090ceff07a",
+          "silk_edge_clearance|87000000|87870000|00000000-0000-0000-0000-0000613f45bd|e26550e5-34b4-4304-810d-288a3aefc5de",
           ""
         ]
       ],
@@ -551,7 +551,7 @@
     "classes": [
       {
         "bus_width": 12,
-        "clearance": 0.1016,
+        "clearance": 0.15,
         "diff_pair_gap": 0.1524,
         "diff_pair_via_gap": 0.25,
         "diff_pair_width": 0.1524,
@@ -568,7 +568,7 @@
         "wire_width": 6
       },
       {
-        "clearance": 0.1016,
+        "clearance": 0.15,
         "diff_pair_gap": 0.18,
         "diff_pair_width": 0.19,
         "microvia_diameter": 0.3,
@@ -581,6 +581,7 @@
         "via_drill": 0.25
       },
       {
+        "clearance": 0.15,
         "diff_pair_gap": 0.165,
         "diff_pair_width": 0.23,
         "name": "90Rdiff",
@@ -589,7 +590,7 @@
         "schematic_color": "rgba(0, 0, 0, 0.000)"
       },
       {
-        "clearance": 0.1,
+        "clearance": 0.15,
         "diff_pair_gap": 0.1524,
         "diff_pair_width": 0.1524,
         "microvia_diameter": 0.3,