implemented frontend including separate message system; started to implement backend

yjs-poll/node_modules/lib0/prng/Xorshift32.js

@@ -0,0 +1,35 @@
+/**
+ * @module prng
+ */
+
+import * as binary from '../binary.js'
+
+/**
+ * Xorshift32 is a very simple but elegang PRNG with a period of `2^32-1`.
+ */
+export class Xorshift32 {
+  /**
+   * @param {number} seed Unsigned 32 bit number
+   */
+  constructor (seed) {
+    this.seed = seed
+    /**
+     * @type {number}
+     */
+    this._state = seed
+  }
+
+  /**
+   * Generate a random signed integer.
+   *
+   * @return {Number} A 32 bit signed integer.
+   */
+  next () {
+    let x = this._state
+    x ^= x << 13
+    x ^= x >> 17
+    x ^= x << 5
+    this._state = x
+    return (x >>> 0) / (binary.BITS32 + 1)
+  }
+}