docs: add NKey file references page; list it on Home; fix spelling
Correct reload behaviour: UDS rules apply to new connections only Existing UDS peer-cred connections are not re-evaluated on reload (the reload authorization machinery is user-based); they keep their account and permissions until they reconnect.
Update UDS docs to match current implementation UDS-Permission-Model: add accounts/scope, a connection-resolution flow, and a worked example; reorder top-down (authentication before the matching reference); drop the unimplemented array-matching column; fix the role-uniqueness claim; add no-default-allow and no_auth_user notes. UNIX-domain-sockets: fix example key quoting, document the nats+uds:// client scheme, the user-namespace/SO_PEERCRED deployment gotcha, and that rules (not the socket) support reload.
Updated UDS Permission Model (markdown)
Update relations
Added documentation for array values
Update for new rule syntax/semantics
Updated Peer authorization (markdown)
Updated UNIX domain sockets (markdown)
Created section design notes in UDS - Multiple UDS sockets - Reload
Update documentation for UDS option changes
Updated Home (markdown)