Decoupled AVR8 physical interface enum from EDBG protocol code

src/Targets/Microchip/AVR/AVR8/PhysicalInterface.hpp

@@ -0,0 +1,12 @@
+#pragma once
+
+namespace Bloom::Targets::Microchip::Avr::Avr8Bit
+{
+    enum class PhysicalInterface: int
+    {
+        JTAG,
+        DEBUG_WIRE,
+        PDI,
+        UPDI,
+    };
+}