feat: Improve the cursor color of day Kitty theme (#153)

* Improve the cursor color of day Kitty theme

Previously the cursor colour would have the default foreground
color which is a a bit too dark when you have a block cursor and use
autocomplete features. Using the background color as the cursor text
ensures that text in a block cursor is always visible.

* Update generation script and other kitty themes

lua/tokyonight/extra/kitty.lua

@@ -20,6 +20,7 @@ selection_background ${bg_visual}
 selection_foreground ${fg}
 url_color ${green1}
 cursor ${fg}
+cursor_text_color ${bg}
 
 # Tabs
 active_tab_background ${blue}