Added placeholder for the garbage collector

src/memory/gc.nim

@@ -0,0 +1,15 @@
+# CONFIDENTIAL
+# ______________
+#
+#  2021 Mattia Giambirtone
+#  All Rights Reserved.
+#
+#
+# NOTICE: All information contained herein is, and remains
+# the property of Mattia Giambirtone. The intellectual and technical
+# concepts contained herein are proprietary to Mattia Giambirtone
+# and his suppliers and may be covered by Patents and are
+# protected by trade secret or copyright law.
+# Dissemination of this information or reproduction of this material
+# is strictly forbidden unless prior written permission is obtained
+# from Mattia Giambirtone