File previews

[ScanMountGoat]

Text or image previews can be displayed in the details panel. The information can go under the details panel or replace it if more space is required.

• C# wrapper for Rust library (create project in this repo)
• display text (should be copyable but not editable)

[ScanMountGoat]

This can use the library developed for giving text previews of supported files. Some of the dependencies should be updated since libraries like ssbh_lib have recieved a number of improvements.
https://github.com/jam1garner/smush-file