Multiple changes (cleanup, remove edison, add felixalbpc)

- Removes hold host edison
- Adds new host, felixalbpc, a work machine. This requires some cleanup
  to fit into the office network, use other SSH keys, etc.
- Clean up some package installs, putting more things into the common
  home-manager packages, rather than systemwide or host-specific homes.
- Various small changes like disabling Github Copilot on nvim startup.

home/base.nix

@@ -7,9 +7,13 @@
 
   home = {
     packages = with pkgs; [
+      bat
       bottom
-      unstable.ncdu
+      ncdu
       neofetch
+      nodejs
+      sshfs
+      sshuttle
     ];
 
     sessionVariables = {
@@ -35,7 +39,7 @@
 
       user = {
         name = "Felix Albrigtsen";
-        email = "felix@albrigtsen.it";
+        email = lib.mkDefault "felix@albrigtsen.it";
       };
     };
     ignores = [