refactor: rename package from mistralrs-server to mistralrs

Rename the RPM package from mistralrs-server-<flavour> to
mistralrs-<flavour> and the installed binary from mistralrs-server
to mistralrs, matching the upstream CLI binary name.

Adds Obsoletes/Provides for the old package name so dnf will cleanly
replace it on upgrade.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

ui/src/pages/Home.tsx

@@ -38,7 +38,7 @@ export function Home() {
 
               <h6 className="mt-4">3. Install a package</h6>
               <CodeBlock language="bash">
-                {`sudo dnf install mistralrs-server-cuda13`}
+                {`sudo dnf install mistralrs-cuda13`}
               </CodeBlock>
             </Card.Body>
           </Card>