volt-preline 0.2.0

• dark-mode: setTheme() and installDarkMode() now also sync the preference to a volt-theme
  cookie (configurable/disable-able via cookie option) so the server can render
  <html class="dark"> up front; new SSR helpers readThemeCookie() and themeHtmlProps().
  The runtime observer now watches style as well as class, because Remix UI frame patches
  rewrite <html> attributes (theme flash on navigation). Document the CSS rule
  html.dark { color-scheme: dark } as the preferred way to derive color-scheme.
• Alert: optional align="center" (default start, non-breaking) centers title, description and
  actions — dialogs rendered inside right-aligned table cells otherwise inherit text-align.
• Docs: searchable single-select Combobox recipe (clear button, option descriptions); note that
  Button takes exactly one of color | outline | plain (there is no variant prop).
• Tests: test/dark-mode.test.ts, test/alert.test.ts (bun test test/).