feat: initialize markr nostr bookmark client

- Add project structure with TypeScript, React, and Vite
- Implement nostr authentication using browser extension (NIP-07)
- Add NIP-51 compliant bookmark fetching and display
- Create minimal UI with login and bookmark components
- Integrate applesauce-core and applesauce-react libraries
- Add responsive styling with dark/light mode support
- Include comprehensive README with setup instructions

This is a minimal MVP for a nostr bookmark client that allows users to
view their bookmarks according to NIP-51 specification.

node_modules/postcss/lib/list.d.ts

@@ -0,0 +1,60 @@
+declare namespace list {
+  type List = {
+    /**
+     * Safely splits comma-separated values (such as those for `transition-*`
+     * and `background` properties).
+     *
+     * ```js
+     * Once (root, { list }) {
+     *   list.comma('black, linear-gradient(white, black)')
+     *   //=> ['black', 'linear-gradient(white, black)']
+     * }
+     * ```
+     *
+     * @param str Comma-separated values.
+     * @return Split values.
+     */
+    comma(str: string): string[]
+
+    default: List
+
+    /**
+     * Safely splits space-separated values (such as those for `background`,
+     * `border-radius`, and other shorthand properties).
+     *
+     * ```js
+     * Once (root, { list }) {
+     *   list.space('1px calc(10% + 1px)') //=> ['1px', 'calc(10% + 1px)']
+     * }
+     * ```
+     *
+     * @param str Space-separated values.
+     * @return Split values.
+     */
+    space(str: string): string[]
+
+    /**
+     * Safely splits values.
+     *
+     * ```js
+     * Once (root, { list }) {
+     *   list.split('1px calc(10% + 1px)', [' ', '\n', '\t']) //=> ['1px', 'calc(10% + 1px)']
+     * }
+     * ```
+     *
+     * @param string separated values.
+     * @param separators array of separators.
+     * @param last boolean indicator.
+     * @return Split values.
+     */
+    split(
+      string: string,
+      separators: readonly string[],
+      last: boolean
+    ): string[]
+  }
+}
+
+declare const list: list.List
+
+export = list