Reorganize imports

Signed-off-by: Nikolaos Karaolidis <nick@karaolidis.com>

hosts/common/configs/system/zsh/default.nix

@@ -0,0 +1,12 @@
+{ ... }:
+{
+  programs.zsh = {
+    enable = true;
+    histFile = "/var/lib/zsh/history";
+  };
+
+  environment = {
+    persistence."/persist"."/var/lib/zsh" = { };
+    pathsToLink = [ "/share/zsh" ];
+  };
+}