feat: integrate two factor authentication (#626)

* feat: integrate SNJS MFA with web

* fix: create rudimentary typings file for qrcode.react

* chore: lint fixes

* fix: address PR feedback

* fix: address PR feedback

* fix: address PR feedback 2

* fix: replace spread props on TwoFactorAuthWrapper component

* chore: change null check to undefined check

package.json

@@ -74,6 +74,7 @@
     "@standardnotes/snjs": "2.12.1",
     "mobx": "^6.3.2",
     "mobx-react-lite": "^3.2.0",
-    "preact": "^10.5.12"
+    "preact": "^10.5.12",
+    "qrcode.react": "^1.0.1"
   }
 }