Convert to React Native TypeScript app, eject React Native WebView

[peterklingelhofer]

Current goal is to put this repository in maintenance mode, and build out a React Native TypeScript implementation in this repository: mobile.

See the beam repository's React/TypeScript codebase that we can probably heavily borrow from for this.

[peterklingelhofer]

If we were to implement a local build of the beam repository before converting to a fully native React Native and TypeScript app, per this comment:

You need to add this prop 'allowingReadAccessToURL' to allow the native web view to read files in the directory you want.

https://github.com/react-native-webview/react-native-webview/blob/master/docs/Reference.md#allowingReadAccessToURL

react-native-webview/react-native-webview#771

Employing the allowingReadAccessToURL prop should allow us to get this functional via local source files.

[peterklingelhofer]

We will be building out a React Native TypeScript implementation in this repository: mobile.