Access Teams session and other information in external tab url application

I would like to create a Teams tab for a clientside rendered application. I know that I can generate a basic app using a generator

https://github.com/OfficeDev/generator-teams

This generator will create a React app and I have to deal with many deployment stuff. I would like to create a Vue app and add it as an external application via URL. The problem is that this generated React app ships with many Teams related packages to provide a nice Teams integration

https://github.com/OfficeDev/msteams-ui-components/tree/master/msteams-ui-components-react

e.g. fetching the current Teams session etc. I also know that Microsoft provides an API to fetch Office related data (Users, Groups, ...)

https://developer.microsoft.com/en-us/graph

So when I create a basic Vue app (or any other client side app) are there any packages I can use to integrate with Teams while having an external tabs app and no native Teams tab application?

I don't want to use the native Teams styles so it seems the only advantage in using native tab applications would be fetching the current Teams session. But I am not sure, this is totally new to me. So I'm hoping the generated React Teams app ships with some packages I can use in my Vue app too and add it via external URL to teams.. ?

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