feat: set new colorscheme for kitty; fix deprecation error for theme option

modules/home/kitty.nix

@@ -3,7 +3,7 @@
   programs.kitty = {
     enable = true;
 
-    theme = "3024 Night";
+    # theme = "3024 Night";
 
     font = {
       name = "GohuFont 14 Nerd Font Mono";
@@ -12,7 +12,7 @@
 
     settings = {
       confirm_os_window_close = 0;
-      background_opacity = "0.25";
+      background_opacity = "0.50";
       window_padding_width = 10;
       scrollback_lines = 10000;
       enable_audio_bell = false;
@@ -35,5 +35,102 @@
       "ctrl+shift+left" = "no_op";
       "ctrl+shift+right" = "no_op";
     };
+    extraConfig = ''
+      # vim:ft=kitty
+
+      ## name: Base2Tone Suburb Dark
+      ## author: Bram de Haan (https://github.com/atelierbram)
+      ## license: MIT
+      ## upstream: https://github.com/atelierbram/Base2Tone-kitty/blob/main/themes/base2tone-suburb-dark.conf
+      ## blurb: duotone theme | warm blue - bright pink
+
+
+      #: The basic colors
+
+      foreground #878ba6
+      # background #1e202f
+      selection_foreground #878ba6
+      selection_background #292c3d
+
+
+      #: Cursor colors
+
+      cursor #d14781
+      cursor_text_color #1e202f
+
+
+      #: URL underline color when hovering with mouse
+
+      url_color #d2d8fe
+
+
+      #: kitty window border colors and terminal bell colors
+
+      active_border_color #444864
+      inactive_border_color #1e202f
+      bell_border_color #5165e6
+      visual_bell_color none
+
+
+      #: OS Window titlebar colors
+
+      wayland_titlebar_color #292c3d
+      macos_titlebar_color #292c3d
+
+
+      #: Tab bar colors
+
+      active_tab_foreground #fbf9fa
+      active_tab_background #1e202f
+      inactive_tab_foreground #b0a6aa
+      inactive_tab_background #292c3d
+      tab_bar_background #292c3d
+      tab_bar_margin_color none
+
+
+      #: Colors for marks (marked text in the terminal)
+
+      mark1_foreground #1e202f
+      mark1_background #6375ee
+      mark2_foreground #1e202f
+      mark2_background #8d8186
+      mark3_foreground #1e202f
+      mark3_background #e44e8c
+
+
+      #: The basic 16 colors
+
+      #: black
+      color0 #1e202f
+      color8 #4f5472
+
+      #: red
+      color1 #7586f5
+      color9 #fe81b5
+
+      #: green
+      color2 #fb6fa9
+      color10 #292c3d
+
+      #: yellow
+      color3 #ffb3d2
+      color11 #444864
+
+      #: blue
+      color4 #8696fd
+      color12 #5b6080
+
+      #: magenta
+      color5 #fb6fa9
+      color13 #d2d8fe
+
+      #: cyan
+      color6 #a0acfe
+      color14 #f764a1
+
+      #: white
+      color7 #878ba6
+      color15 #ebedff
+    '';
   };
 }