Add Protobuf with Testing + Codegen (#7)

Reviewed-on: #7
Reviewed-by: Ivan Malison <ivanmalison@gmail.com>
Co-authored-by: Mike Kalange <countablecloud@gmail.com>
Co-committed-by: Mike Kalange <countablecloud@gmail.com>

flake.nix

@@ -21,7 +21,7 @@
     in
       with pkgs; {
         devShell = mkShell {
-          buildInputs = [nodejs yarn watchman alejandra nodePackages.prettier just];
+          buildInputs = [nodejs yarn watchman alejandra nodePackages.prettier just protobuf];
         };
       });
 }