docs(website): fold the docs page into five parts and drop the byline

The docs page carried three daemon sections in a row, each with its own
numbered head, so the one story the daemon tells read as three. They are now
sub-heads under 5 · the daemon. The agents section is gone, first run points
at /install instead of assuming Homebrew, and the layout section shows the
demo next to the pane descriptions rather than describing boxes nobody sees.

The footer no longer signs the project with a personal name, and the TUI
demo no longer shows a home directory that only exists on one machine.

Community picks up the sharing etiquette cards and SeeleSeek; install and
home lose a few em-dashes.

website/src/lib/routes.ts

@@ -27,7 +27,7 @@ export const ROUTES = [
     path: '/community',
     title: 'soulseek-rs, community',
     description:
-      'How to help with soulseek-rs, and where to go when another Soulseek client fits you better. MIT licensed. No telemetry.',
+      'Soulseek etiquette: what sharing asks of you, how to help with soulseek-rs, and where to go when another client fits you better.',
   },
 ] as const satisfies readonly RouteMeta[]