(qol): update readme

README.md

@@ -3,66 +3,3 @@
 ```sh
 pnpm install https://git.methanium.net/methanium/ui/releases/download/latest/methanium-ui.tgz
 ```
-
-Import the stylesheet once, then add the provider at the application root:
-
-```tsx
-import "@methanium/ui/index.css";
-import { ThemeProvider } from "@methanium/ui";
-
-<ThemeProvider>{children}</ThemeProvider>;
-```
-
-## App Default
-
-Vite applications can choose their initial parent theme at build time:
-
-```ts
-import { methaniumUi } from "@methanium/ui/vite";
-
-export default defineConfig({
-  plugins: [methaniumUi({ defaultThemeId: "tensamin" })],
-});
-```
-
-The built-in parent themes are `tensamin`, `og-tensamin`, `methanium`, and
-`secret`. Without the plugin or a provider override, the neutral base theme is
-used.
-Public Sans is bundled as the default typeface; users can switch to their
-platform's system font in the customizer.
-
-## Custom Themes
-
-Pass a typed manifest to `ThemeProvider` to add themes. Presets are ordinary
-CSS and remain fully editable after selection.
-
-```ts
-import {
-  BUILT_IN_THEMES,
-  DEFAULT_THEME_DESIGN,
-  defineThemes,
-} from "@methanium/ui";
-
-export const themes = defineThemes([
-  ...BUILT_IN_THEMES,
-  {
-    id: "my-theme",
-    title: "My Theme",
-    logo: "/themes/my-logo.svg",
-    defaultValues: {
-      borderRadius: 0.5,
-      design: { ...DEFAULT_THEME_DESIGN, density: 0.95 },
-    },
-    css: `:root[data-theme="my-theme"] { --primary: #ff4f91; }`,
-  },
-]);
-```
-
-Use `<ThemeCustomizer />` for all theme editing. `<ThemeSelector />` is its
-focused parent-theme selection control.
-
-## Onboarding
-
-Every `OnboardingStep` requires a `title`; the flow owns title rendering and
-focus. `<ThemeOnboardingPage />` applies choices immediately and prevents
-continuing until the user explicitly selects a theme.