Add useAuthor code snippet to CONTEXT.md

CONTEXT.md

@@ -117,6 +117,53 @@ function usePosts() {
 
 The data may be transformed into a more appropriate format if needed, and multiple calls to `nostr.query()` may be made in a single queryFn.
 
+### The `useAuthor` Hook
+
+To display profile data for a user by their Nostr pubkey (such as an event author), use the `useAuthor` hook.
+
+```tsx
+import { NostrEvent, NostrMetadata } from '@nostrify/nostrify';
+import { useAuthor } from '@/hooks/useAuthor';
+
+function Post({ event }: { event: NostrEvent }) {
+  const author = useAuthor(event.pubkey);
+  const metadata: NostrMetadata | undefined = author.data?.metadata;
+
+  const displayName = metadata?.name || event.pubkey.slice(0, 8);
+  const profileImage = metadata?.picture;
+
+  // ...render elements with this data
+}
+```
+
+#### `NostrMetadata` type
+
+```ts
+/** Kind 0 metadata. */
+interface NostrMetadata {
+  /** A short description of the user. */
+  about?: string;
+  /** A URL to a wide (~1024x768) picture to be optionally displayed in the background of a profile screen. */
+  banner?: string;
+  /** A boolean to clarify that the content is entirely or partially the result of automation, such as with chatbots or newsfeeds. */
+  bot?: boolean;
+  /** An alternative, bigger name with richer characters than `name`. `name` should always be set regardless of the presence of `display_name` in the metadata. */
+  display_name?: string;
+  /** A bech32 lightning address according to NIP-57 and LNURL specifications. */
+  lud06?: string;
+  /** An email-like lightning address according to NIP-57 and LNURL specifications. */
+  lud16?: string;
+  /** A short name to be displayed for the user. */
+  name?: string;
+  /** An email-like Nostr address according to NIP-05. */
+  nip05?: string;
+  /** A URL to the user's avatar. */
+  picture?: string;
+  /** A web URL related in any way to the event author. */
+  website?: string;
+}
+```
+
 ### The `useNostrPublish` Hook
 
 To publish events, use the `useNostrPublish` hook in this project.