feat: add @domain alias for NIP-05 domain directory resolution (#136)

Add support for @domain syntax in req and count commands to query all
users from a domain's NIP-05 directory (e.g., @habla.news).

Features:
- Fetches /.well-known/nostr.json from domain
- Extracts all pubkeys from the names object
- Works with -a (authors), -p (#p tags), and -P (#P tags) flags
- Supports mixed usage with npub, hex, NIP-05, $me, $contacts
- 5-minute caching for domain lookups
- UI display in ReqViewer query dropdown

Implementation:
- Added resolveDomainDirectory and resolveDomainDirectoryBatch to nip05.ts
- Updated req-parser and count-parser to detect @domain syntax
- Updated argParsers in man.ts to resolve domains asynchronously
- Updated ReqViewer to display queried domains in dropdown
- Added comprehensive tests for domain resolution

Examples:
- req -k 1 -a @habla.news
- req -k 7 -p @nostr.band
- count relay.damus.io -k 1 -a @getcurrent.io

Co-authored-by: Claude <noreply@anthropic.com>

src/components/WindowRenderer.tsx

@@ -154,6 +154,8 @@ export function WindowRenderer({ window, onClose }: WindowRendererProps) {
             view={window.props.view}
             nip05Authors={window.props.nip05Authors}
             nip05PTags={window.props.nip05PTags}
+            domainAuthors={window.props.domainAuthors}
+            domainPTags={window.props.domainPTags}
             needsAccount={window.props.needsAccount}
           />
         );