DWEN fuse bit field validation (in TDFs) for AVR8 debugWire targets

build/scripts/TargetDescriptionFiles/AVR8/FuseBitDescriptor.php

@@ -0,0 +1,11 @@
+<?php
+namespace Bloom\BuildScripts\TargetDescriptionFiles\Avr8;
+
+class FuseBitDescriptor
+{
+    const FUSE_TYPE_LOW = 'low';
+    const FUSE_TYPE_HIGH = 'high';
+    const FUSE_TYPE_EXTENDED = 'extended';
+
+    public ?string $fuseType = null;
+}