feat: Add initial Mobilizon => Discord sync (#1)

Closes #2 , #3

Co-authored-by: Piotr Gaczkowski <DoomHammerNG@gmail.com>
Reviewed-on: #1
Reviewed-by: leming leming <leming@hs3.pl>

shell.nix

@@ -0,0 +1,17 @@
+# Use npins to pin nixpkgs dependencies
+# This makes it easier to cache build results
+{
+  sources ? import ./npins,
+  system ? builtins.currentSystem,
+  pkgs ? import sources.nixpkgs {
+    inherit system;
+    config = { };
+    overlays = [ ];
+  },
+}:
+# Create a nix shell with devenv (so `use devenv` can work in direnv/.envrc)
+pkgs.mkShell {
+  buildInputs = with pkgs; [
+    devenv
+  ];
+}