feat(system): disable orca, enable envfs

envfs enables compatibility on NixOS for scripts which assume the prensence
of some files, such as /bin/bash, which are usually present on other *Nix
systems.

system/default.nix

@@ -36,5 +36,9 @@ in {
     boot.tmp.cleanOnBoot = true;
     time.timeZone = cfg.timezone;
     console.keyMap = cfg.keymap;
+    services = {
+      orca.enable = false;
+      envfs.enable = true;
+    };
   };
 }