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/mise/config.toml

@@ -4,7 +4,6 @@ experimental = true
 [tools]
 age = "latest"
 bun = "latest"
-"cargo:cargo-llvm-cov" = "latest"
 codex = "latest"
 copilot-cli = "latest"
 "github:ZinoKader/portal" = "latest"
@@ -18,3 +17,18 @@ herdr = "latest"
 opencode = "latest"
 pi = "latest"
 worktrunk = "latest"
+
+[tasks.setup_pi]
+run = [
+    'pi install npm:pi-lens',
+    'pi install npm:pi-native-search',
+    'pi install npm:@tintinweb/pi-subagents',
+    'pi install npm:context-mode',
+    'pi install npm:@gotgenes/pi-permission-system',
+    'test -x /usr/bin/pass && /usr/bin/pass show agent/pi/auth.json > ~/.pi/agent/auth.json'
+]
+
+[tasks.setup_nvim]
+run = [
+    'uv tool install vectorcode'
+]