feat: add waybar colors.css for centralized color definitions;
experiment: change cava visual style to solid blue foreground and disable gradient;
chore: remove nwg-dock-hyprland from hyprland autostart and toggle scripts;
refactor: update waybar launch commands to use new config_top.jsonc and style_top.css;
refactor: simplify gamemode.sh by removing STATUSBAR variable and updating waybar commands;
chore: add placeholder config_bottom.jsonc and style_bottom.css for future dual-bar setup
