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/kitty.conf

@@ -0,0 +1,27 @@
+foreground #a9b1d6
+background #1a1b26
+selection_foreground #c0caf5
+selection_background #7aa2f7
+
+cursor #c0caf5
+cursor_text_color #1a1b26
+
+active_border_color #7aa2f7
+active_tab_background #7aa2f7
+
+color0 #32344a
+color1 #f7768e
+color2 #9ece6a
+color3 #e0af68
+color4 #7aa2f7
+color5 #ad8ee6
+color6 #449dab
+color7 #787c99
+color8 #444b6a
+color9 #ff7a93
+color10 #b9f27c
+color11 #ff9e64
+color12 #7da6ff
+color13 #bb9af7
+color14 #0db9d7
+color15 #acb0d0