feat(fish): add fish_color_option (folke#586)

## Description

Colorize `fish_color_option` in fish

- Before

![image](https://github.com/folke/tokyonight.nvim/assets/17734314/acd6c79a-c7c9-4de3-baa9-918b6ae7a142)

- After

![image](https://github.com/folke/tokyonight.nvim/assets/17734314/7b3c1e1e-48ce-4594-bf14-a064163c98a6)


## Related Issue(s)

None

## Screenshots

Attached above

lua/tokyonight/extra/fish.lua

@@ -32,6 +32,7 @@ function M.generate(colors)
     set -g fish_color_quote $yellow
     set -g fish_color_redirection $foreground
     set -g fish_color_end $orange
+    set -g fish_color_option $orange
     set -g fish_color_error $red
     set -g fish_color_param $purple
     set -g fish_color_comment $comment

lua/tokyonight/extra/fish_themes.lua

@@ -22,6 +22,7 @@ function M.generate(colors)
     fish_color_quote ${yellow}
     fish_color_redirection ${fg}
     fish_color_end ${orange}
+    fish_color_option ${orange}
     fish_color_error ${red}
     fish_color_param ${purple}
     fish_color_comment ${comment}