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

bootstrap

@@ -5,13 +5,14 @@ if [[ -z "${DOTFILES_DIR:-}" ]]; then
   export DOTFILES_DIR=$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)
 fi
 
-script_dir="$script_dir/installer"
+script_dir="$DOTFILES_DIR/installer"
 
 shopt -s nullglob
 
 ran_any=false
 for script in "$script_dir"/*.sh; do
   if [[ -f "$script" && -x "$script" ]]; then
+    echo $script
     "$script"
     ran_any=true
   fi