Create README.md

Author: bogdaniculae

docs/design-system-1.0/README.md

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+---
+sectionTitle: Design System 1.0 (old)
+sectionOrder: 40
+---
+
+# Design System 1.0 (Deprecated)
+
+> **This library is deprecated.** Please use [@bcc-code/design-tokens](https://www.npmjs.com/package/@bcc-code/design-tokens) with [PrimeVue](https://primevue.org/) instead.
+
+## Storybook
+
+View the old component library in Storybook:
+
+- [Production Storybook](https://design-library.developer.bcc.no)
+- [Dev Storybook](https://design-library-dev.developer.bcc.no) (unreleased changes)
+
+## Packages
+
+| Package | Status |
+|---------|--------|
+| `@bcc-code/design-library-vue` | Deprecated |
+| `@bcc-code/design-library-css` | Deprecated |
+
+## Migration
+
+To migrate to the new design tokens:
+
+1. Install the new package: `npm install @bcc-code/design-tokens`
+2. Replace custom BCC components with PrimeVue components
+3. Use the BCC preset for PrimeVue theming
+4. See [Getting Started](../getting-started/) for setup instructions
+
+## Source Code
+
+The deprecated design-library source code is available in the [design-library folder](https://github.com/bcc-code/bcc-design/tree/main/design-library) of the bcc-design repository.