feat: add yazi as new file manager and move neovim to system packages

programs/fish/default.nix

@@ -46,6 +46,15 @@
       trash_file.body = ''
         mv $argv ~/.local/share/Trash
       '';
+
+      ya.body = ''
+        set tmp (mktemp -t "yazi-cwd.XXXXX")
+        yazi $argv --cwd-file="$tmp"
+        if set cwd (cat -- "$tmp"); and [ -n "$cwd" ]; and [ "$cwd" != "$PWD" ]
+          cd -- "$cwd"
+        end
+        rm -f -- "$tmp"
+      '';
     };
   };
 }