Convert the bridge bot into a wizard

We decided to convert the previous bridge bot designs from a chatbot into a simple wizard instead.

The Figma file can be found here: Figma / Tor VPN for Android

Please note it contains two versions:

• a basic, one-button version, which we're intending to build for the MVP.
• a more complex two-button version, which includes an extra button to look up location settings from the circumvention.json.

The second, two-button version may be ignored for this iteration of the app.

The middle-screen includes a standard MD3 linear progress indicator. Documentation for this component can be found here: https://m3.material.io/components/progress-indicators/overview

As it's effectively more of a spinner than a true progress indicator, please follow the animation guidelines for the indeterminate version demo'd here (which I've approximated in static-format in Figma): https://m3.material.io/components/progress-indicators/guidelines