chore(nix): add shell.nix for development w/ nix

5 jobs for master in 19 minutes and 22 seconds (queued for 6 seconds)
Status Name Job ID Coverage
  Qa
passed clone #1644482

00:00:34

passed fmt #1644481

00:01:08

 
  Build
passed clippy #1644483

00:10:04

passed flatpak #1644484
flatpak

00:17:24

 
  Deploy
failed pages #1644485

00:00:48

 
Name Stage Failure
failed
pages Deploy
Build targets in project: 10
WARNING: Deprecated features used:
* 0.56.0: {'meson.build_root', 'meson.source_root'}

Found ninja-1.10.2 at /usr/bin/ninja
$ cargo makedocs -i "health"
error: no such subcommand: `makedocs`
Cleaning up project directory and file based variables
ERROR: Job failed: exit code 1