Support iframing so we can integrate TM directly into other apps

A lot of applications have data and could use AI chat with that data. instead of building out chat app inside each application, and without having to open typing mind in a new tab/app, it would be great to be able to iframe typingmind in the app itself.

typingmind already allows it to be embedded, which is good. however, it loses login context (like license and such). could we get that?

that way, we can build extensions on top of it to support deeper integrations like with window postMessaging. the vision would be the main app can call "TM.sendMessage()" to start a convo and other stuff

like this: https://www.photopea.com/api/

not like this: https://custom.typingmind.com/features/build-custom-chatbot