🖼 Replaced Dolphin with Nauvis, mime types, image-viewer

- Added Gstreamer packages for audio data
- Replaced catppuccin wallpaper on lockscreen with one where the logo is higher
- Replaced dolphin with nautilus file manager
- Moved Gnome related configs to /gnome
- Added Gnome appindicator and extension manager
- Added loupe and gimp
- Added mime types for image files

gnome/default.nix

@@ -0,0 +1,26 @@
+{ pkgs, ... }:
+
+{
+  imports = [
+    ./nautilus.nix
+  ];
+
+  environment.systemPackages = with pkgs; [
+    adw-gtk3
+    glib
+    adwaita-icon-theme
+    gnomeExtensions.appindicator
+    gnome-extension-manager
+    loupe
+  ];
+
+  programs = {
+    dconf.enable = true; # Required for some gnome applications
+  };
+
+  services = {
+    gnome.gnome-keyring.enable = true;
+    gvfs.enable = true; # Gnome Virtual File-system. Required for various things in nautilus
+    udev.packages = with pkgs; [ gnome-settings-daemon ];
+  };
+}

gnome/nautilus.nix

@@ -0,0 +1,9 @@
+{ pkgs, ... }:
+# TODO file-preview for videos, svgs and other types
+{
+  environment.systemPackages = with pkgs; [
+    nautilus
+  ];
+
+  programs.nautilus-open-any-terminal.enable = true;
+}