[refactor] Moved getRandombyte to its own TS file

Also made use of `getRandomInt`

utils/helpers/getRandomByte.ts

@@ -0,0 +1,13 @@
+import { getRandomInt } from "./getRandomInt";
+
+/**
+ * Gets a random value in the range of a byte (0 - 255), or up to the maximum.
+ * @param max The maximum value (up to 255).
+ */
+export function getRandomByte(max: number) {
+    // Technically 2^8 is 256, but the values are 0-255, not 1-256.
+    const byteMaximum: number = 255;
+    const upper: number = Math.max(Math.min(max, byteMaximum), 0);
+
+    return getRandomInt(0, upper);
+}