Remove `useFonts` and embed them as part of the App Binary

Good morning Infinite Red,

I came across this X.com thread: https://x.com/aleqsio/status/1968273285239734405 and I read through the expo font docs: https://docs.expo.dev/versions/latest/sdk/font/

and they talk about the preference for fonts is to not use `useFonts` and load them asynchronously but to include them in the app binary using the `expo-config-plugin`. I just finished getting this working in my app, and here are all the diffs, which should be similar to ignite, just with different fonts:

App.tsx:

app.json:

package.json:

typography:

Then you have to add the font files under the assets/fonts folder.

This should theoretically decrease the TTI of the app and reduce splash screen show time.

Review App.tsx, app.json, package.json, typography, and assets/fonts first, alongside the Expo font and config-plugin documentation. Confirm the current font-loading path and app configuration. Done means the fonts are bundled in the app binary and asynchronous useFonts loading is removed.

Written by the indexing model from the issue text.