Added NccBuildFlags

src/ncc/Abstracts/NccBuildFlags.php

@@ -0,0 +1,12 @@
+<?php
+
+    namespace ncc\Abstracts;
+
+    abstract class NccBuildFlags
+    {
+        /**
+         * Indicates if the build is currently unstable and some features may not work correctly
+         * and can cause errors
+         */
+        const Unstable = 'UNSTABLE';
+    }