Refactored TDF processing PHP code to confirm to new TDF format

build/scripts/Targets/TargetDescriptionFiles/TargetFamily.php

@@ -0,0 +1,8 @@
+<?php
+namespace Targets\TargetDescriptionFiles;
+
+enum TargetFamily: string
+{
+    case AVR_8 = 'AVR8';
+    case RISC_V = 'RISCV';
+}