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

config/omarchy/default/alacritty.toml

@@ -0,0 +1,47 @@
+[colors.primary]
+background = "#1a1b26"
+foreground = "#a9b1d6"
+
+[colors.cursor]
+text = "#1a1b26"
+cursor = "#c0caf5"
+
+[colors.vi_mode_cursor]
+text = "#1a1b26"
+cursor = "#c0caf5"
+
+[colors.search.matches]
+foreground = "#1a1b26"
+background = "#e0af68"
+
+[colors.search.focused_match]
+foreground = "#1a1b26"
+background = "#f7768e"
+
+[colors.footer_bar]
+foreground = "#1a1b26"
+background = "#a9b1d6"
+
+[colors.selection]
+text = "#c0caf5"
+background = "#7aa2f7"
+
+[colors.normal]
+black = "#32344a"
+red = "#f7768e"
+green = "#9ece6a"
+yellow = "#e0af68"
+blue = "#7aa2f7"
+magenta = "#ad8ee6"
+cyan = "#449dab"
+white = "#787c99"
+
+[colors.bright]
+black = "#444b6a"
+red = "#ff7a93"
+green = "#b9f27c"
+yellow = "#ff9e64"
+blue = "#7da6ff"
+magenta = "#bb9af7"
+cyan = "#0db9d7"
+white = "#acb0d0"