Add TODO

TODO.md

+- Use a diode footprint a bit bigger for hand soldering
+
+- Move diode D48 away from MK5
+
+- Remove ground plane micro-vias near :
+ - D1, D3, D5, D7, D9, D11, D13
+ - D29, D31, D33, D36, D38, D40
+ - D57, D59, D62, D64, D66
+ - D75, D77, D80, D82
+ - blah blah same for pads whatever everywhere
+