Adjust PoE and change 3.3V supply topology

-Snubber circuit under ecrtail load condition can dissipate more power
then the resistor can handle, increased the resistor size and added one
more in parallel
-Increased size of some of the 12V input capacitors
-Use 3.3Vp instead of 3.3V generated by the RPi for LED, RTC, Radio, Fan
control and RPi reduced hat connector
-PoE pri/sec capacitor value changed

Signed-off-by: Dominik Sliwa <dominik@sliwa.io>

Yellow.kicad_prl

@@ -1,6 +1,6 @@
 {
   "board": {
-    "active_layer": 31,
+    "active_layer": 0,
     "active_layer_preset": "",
     "auto_track_width": true,
     "hidden_nets": [],