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/bin/0ecdsa-generate-keypair.js

@@ -0,0 +1,15 @@
+#!/usr/bin/env node
+import * as ecdsa from 'lib0/crypto/ecdsa'
+import * as json from 'lib0/json'
+import * as env from 'lib0/environment'
+
+const prefix = env.getConf('name')
+
+const keypair = await ecdsa.generateKeyPair({ extractable: true })
+const privateJwk = json.stringify(await ecdsa.exportKeyJwk(keypair.privateKey))
+const publicJwk = json.stringify(await ecdsa.exportKeyJwk(keypair.publicKey))
+
+console.log(`
+${prefix ? prefix.toUpperCase() + '_' : ''}PUBLIC_KEY=${publicJwk}
+${prefix ? prefix.toUpperCase() + '_' : ''}PRIVATE_KEY=${privateJwk}
+`)