refactor: remove legacy Wayland shell fallbacks

[CollieIsCute]

Summary

• remove Waybar, Rofi, SwayNC, Hypridle, Hyprlock, and Hyprpaper fallback source configs now that Noctalia v5 owns the shell layer
• remove legacy fallback packages and Waybar external theme fetch
• add chezmoi removal entries so existing targets are cleaned up on apply

Validation

• noctalia config validate /home/collie/.local/share/chezmoi/home/dot_config/noctalia/config.toml
• chezmoi apply --dry-run -v
• chezmoi data
• git diff --check