add emotes and npcs. this really needs a cleanup

common/util.js

@@ -0,0 +1,16 @@
+import crypto from "../crypto.js";
+
+function distF(ent, target) {
+    return ((ent.pos.x - target.pos.x) ** 2) + ((ent.pos.y - target.pos.y) ** 2)
+}
+
+function uuidv4() {
+    return "#000000-000000".replace(/[018]/g, c =>
+        (+c ^ crypto.getRandomValues(new Uint8Array(1))[0] & 15 >> +c / 4).toString(16)
+    );
+}
+
+export {
+    distF,
+    uuidv4
+}