feat: Add Be and tbd skill, also added Roadmap file

Skills/@be/node_modules/pixi.js/lib/polyfill/Math.sign.js

@@ -0,0 +1,17 @@
+"use strict";
+
+// References:
+// https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/Math/sign
+
+if (!Math.sign) {
+    Math.sign = function mathSign(x) {
+        x = Number(x);
+
+        if (x === 0 || isNaN(x)) {
+            return x;
+        }
+
+        return x > 0 ? 1 : -1;
+    };
+}
+//# sourceMappingURL=Math.sign.js.map