Device: Implement Ethernet PHY MDIO Communication

The following fixups were added during the squash/merge:

Fix formatting in EthPhyMessage and EthPhyRegPacket
Device: Use std::make_shared when creating the EthPHYControl filter
Network: Create NetID String for EthPHYControl
EthPhyRegPacket: Constants in PascalCase

include/icsneo/communication/command.h

@@ -23,7 +23,8 @@ enum class Command : uint8_t {
     GetVBattReq = 0xDF, // Previously known as RED_CMD_VBATT_REQUEST
 	MiscControl = 0xE7,
 	Extended = 0xF0,
-	FlexRayControl = 0xF3
+	FlexRayControl = 0xF3,
+	PHYControlRegisters = 0xEF
 };
 
 enum class ExtendedCommand : uint16_t {