Added address space unit size to MemorySegment and MemorySegmentSection

Some recfactoring

build/scripts/Targets/TargetDescriptionFiles/AddressRange.php

@@ -0,0 +1,32 @@
+<?php
+namespace Targets\TargetDescriptionFiles;
+
+class AddressRange
+{
+    public int $startAddress;
+    public int $endAddress;
+
+    public function __construct(int $startAddress, int $endAddress)
+    {
+        $this->startAddress = $startAddress;
+        $this->endAddress = $endAddress;
+    }
+
+    public function size(): int
+    {
+        return $this->endAddress - $this->startAddress + 1;
+    }
+
+    public function contains(AddressRange $other): bool
+    {
+        return $this->startAddress <= $other->startAddress && $this->endAddress >= $other->endAddress;
+    }
+
+    public function intersectsWith(AddressRange $other): bool
+    {
+        return
+            ($other->startAddress <= $this->startAddress && $other->endAddress >= $this->startAddress)
+            || ($other->startAddress >= $this->startAddress && $other->startAddress <= $this->endAddress)
+        ;
+    }
+}