nixos/core-desktop: add pcmanfm configuration

I don't expect it to be fully working (pcmanfm.conf),
but I had it uncommited oops

nix-os/core-desktop.nix

@@ -32,5 +32,71 @@
       (nerdfonts.override { fonts = [ "Meslo" ]; })
       roboto
     ];
+
+    # Pcmanfm configuration
+    environment.etc."xdg/pcmanfm/default/pcmanfm.conf".text = ''
+      [config]
+      bm_open_method=0
+
+      [volume]
+      mount_on_startup=0
+      mount_removable=0
+      autorun=0
+
+      [ui]
+      always_show_tabs=1
+      max_tab_chars=32
+      media_in_new_tab=0
+      desktop_folder_new_win=0
+      change_tab_on_drop=1
+      close_on_unmount=1
+      focus_previous=1
+      side_pane_mode=places
+      view_mode=list
+      show_hidden=1
+      sort=name;ascending;
+      toolbar=newwin;newtab;navigation;home;
+      show_statusbar=1
+      pathbar_mode_buttons=0
+    '';
+
+    environment.etc."xdg/libfm/libfm.conf".text = ''
+      [config]
+      single_click=0
+      use_trash=1
+      confirm_del=1
+      confirm_trash=1
+      advanced_mode=0
+      si_unit=0
+      force_startup_notify=1
+      backup_as_hidden=1
+      no_usb_trash=1
+      no_child_non_expandable=0
+      show_full_names=0
+      only_user_templates=0
+      drop_default_action=auto
+      terminal=${lib.optionalString (lib.elem pkgs.kitty config.environment.systemPackages) "kitty"}
+      archiver=file-roller
+      thumbnail_local=1
+      thumbnail_max=16384
+
+      [ui]
+      big_icon_size=48
+      small_icon_size=16
+      pane_icon_size=16
+      thumbnail_size=128
+      show_thumbnail=1
+      shadow_hidden=1
+
+      [places]
+      places_home=1
+      places_desktop=1
+      places_root=1
+      places_computer=1
+      places_trash=1
+      places_applications=1
+      places_network=1
+      places_unmounted=1
+    '';
   };
 }