Add `RemoteImage` using landscapist and coil

[wmontwe]

This adds a RemoteImage to the design system to load images from URLs and files. It uses landscapist as abstraction layer for compose and coil as the image loader.

First step to allow account images in the app.

[cketti]

This is adding a lot of new and unnecessary dependencies, e.g.

• io.coil-kt:coil-gif
• io.coil-kt:coil-video
• com.squareup.okhttp3:okhttp-sse
• io.ktor:ktor-*
• (com.github.skydoves:landscapist-*)

It looks like we could avoid all of that without loss of functionality by using Coil's AsyncImage directly. Since we don't actually want to load images via http(s), we don't even have to include any of Coil's network bindings.