add bash fn to toggle kitty term theme

bash/.bashrc

@@ -198,8 +198,18 @@ else
 fi
 unset color_prompt
 
-# setup kitty
-~/.config/kitty/setup.sh
+# setup kitty, it will export TERM_COLOR_MODE (can be light or dark)
+source ~/.config/kitty/setup.sh
+# function to toggle kitty terminal theme
+toggle_theme() {
+    if [ "$TERM_COLOR_MODE" == "light" ]; then
+        export TERM_COLOR_MODE=dark
+        kitten @ set-colors --all "$HOME/.config/kitty/dark.conf"
+    else
+        export TERM_COLOR_MODE=light
+        kitten @ set-colors --all "$HOME/.config/kitty/light.conf"
+    fi
+}
 
 type -p curl >/dev/null || echo -e "$WARNING curl is not installed"