Some recent changes to the Rust part of the codebase made it quite
difficult to locally build the project due to tauri's heavy dependencies
on WebKitGTK and other native libraries.
I tried working around this on my local (nix) machine and found it quite
difficult. The cleanest way here is to make use of what Nix calls
"devshells" which give you an environment specifically for hacking on
your project.
Unfortunately, these files need to be tracked in version control and
cannot be ignored (at least I've not found a way to do that). Given that
we already have a lot of clutter in our repository, I put them under
`scripts/nix`.
They are generally useful. I also added a `.envrc` file which
automatically launches the dev-shell. As a result, you have a shell
ready to go with all your dependencies as soon as you `cd` into our
repository (assuming you use `direnv` and it is hooked up with your
shell).
I didn't really want to have any of my local setup leak into the repo
because I think apart from me and @conectado, nobody is using nix, thus
I hope this minimal footprint is an okay compromise.
