[Force upgrade] Fetch and parse app config

[owencraston]

Description

Write a short description of the changes included in this pull request, also include relevant motivation and context. Have in mind the following questions,
1. What is the reason for the change?

• fetches minimum versions from https://metamask.github.io/metamask-mobile/AppConfig/v1/AppConfig.json
• parses into useable typescript object
  2. What is the improvement/solution?
• this will allow us to query the minimum versions from the main app and trigger the upgrade warning
• adding the FetchState interfaces means we can reuse this same interface for any view that is waiting for a response from an api
• this follows a similar pattern as MVVM

Testing

• to test paste this code into a component

  const appConfig = useAppConfig();
  useEffect(() => {
    if (appConfig.type === 'Success') {
      console.log('app config response', appConfig.data);
    } else {
      console.log({ appConfig });
    }
  });

Screenshots/Recordings
This is what is hosted on the site

temporarily logged the response in the app/components/Nav/App/index.js file and got sane values back

Issue

Progresses #4811

Checklist

• There is a related GitHub issue
• Tests are included if applicable
• Any added code is fully documented

[github-actions]

CLA Signature Action: All authors have signed the CLA. You may need to manually re-run the blocking PR check if it doesn't pass in a few minutes.

[sethkfman]

LGTM

[gantunesr]