refactor: migrate from shell-based sync to mise dotfiles management

- Replace sync-config/sync-script with mise.toml [dotfiles] directives
- Convert installer scripts to mise tasks (shells, desktop, theme, webapps)
- Remove config/nvim-old (deprecated neovim config)
- Add omarchy theme system with multi-app configs (btop, hyprland, kitty, foot, tmux, etc.)
- Move SSH hosts to config.d/* include pattern
- Add Tera templates for dynamic config generation (git-local, dofiles.conf)
- Update pi agent settings (0.80.10, packages list)
- Add mise tasks for pi plugin setup and nvim tooling

installer/00-install-networkmanager.sh

@@ -1,6 +1,6 @@
 #!/bin/sh -e
 
-pacman -Sy --noconfirm networkmanager
+sudo pacman -Sy --noconfirm networkmanager
 
 if [[ -x "$(command -v systemctl)" ]]; then
 	sudo systemctl enable --now NetworkManager.service