Added gem template for custom tool in C++.

Signed-off-by: Chris Galvan <chgalvan@amazon.com>

Templates/CustomTool/Template/Code/Source/${Name}Module.cpp

@@ -0,0 +1,25 @@
+// {BEGIN_LICENSE}
+/*
+ * Copyright (c) Contributors to the Open 3D Engine Project.
+ * For complete copyright and license terms please see the LICENSE at the root of this distribution.
+ *
+ * SPDX-License-Identifier: Apache-2.0 OR MIT
+ *
+ */
+// {END_LICENSE}
+
+#include <${Name}ModuleInterface.h>
+#include <${Name}SystemComponent.h>
+
+namespace ${SanitizedCppName}
+{
+    class ${SanitizedCppName}Module
+        : public ${SanitizedCppName}ModuleInterface
+    {
+    public:
+        AZ_RTTI(${SanitizedCppName}Module, "${ModuleClassId}", ${SanitizedCppName}ModuleInterface);
+        AZ_CLASS_ALLOCATOR(${SanitizedCppName}Module, AZ::SystemAllocator, 0);
+    };
+}// namespace ${SanitizedCppName}
+
+AZ_DECLARE_MODULE_CLASS(Gem_${SanitizedCppName}, ${SanitizedCppName}::${SanitizedCppName}Module)