FRE-600: Fix code review blockers

- Consolidated duplicate UndoManagers to single instance
- Fixed connection promise to only resolve on 'connected' status
- Fixed WebSocketProvider import (WebsocketProvider)
- Added proper doc.destroy() cleanup
- Renamed isPresenceInitialized property to avoid conflict

Co-Authored-By: Paperclip <noreply@paperclip.ing>

node_modules/lib0/number.js

@@ -0,0 +1,37 @@
+/**
+ * Utility helpers for working with numbers.
+ *
+ * @module number
+ */
+
+import * as math from './math.js'
+import * as binary from './binary.js'
+
+export const MAX_SAFE_INTEGER = Number.MAX_SAFE_INTEGER
+export const MIN_SAFE_INTEGER = Number.MIN_SAFE_INTEGER
+
+export const LOWEST_INT32 = 1 << 31
+export const HIGHEST_INT32 = binary.BITS31
+export const HIGHEST_UINT32 = binary.BITS32
+
+/* c8 ignore next */
+export const isInteger = Number.isInteger || (num => typeof num === 'number' && isFinite(num) && math.floor(num) === num)
+export const isNaN = Number.isNaN
+export const parseInt = Number.parseInt
+
+/**
+ * Count the number of "1" bits in an unsigned 32bit number.
+ *
+ * Super fun bitcount algorithm by Brian Kernighan.
+ *
+ * @param {number} n
+ */
+export const countBits = n => {
+  n &= binary.BITS32
+  let count = 0
+  while (n) {
+    n &= (n - 1)
+    count++
+  }
+  return count
+}