feat(crypto): hash algorithm for EdDSA (#638)

* feat(crypto): hash algorithm for EdDSA

* update code comment

* rp: modify keytype check to support EdDSA

* example: signing algs from discovery

---------

Co-authored-by: Livio Spring <livio.a@gmail.com>

example/client/app/app.go

@@ -56,6 +56,7 @@ func main() {
 		rp.WithVerifierOpts(rp.WithIssuedAtOffset(5 * time.Second)),
 		rp.WithHTTPClient(client),
 		rp.WithLogger(logger),
+		rp.WithSigningAlgsFromDiscovery(),
 	}
 	if clientSecret == "" {
 		options = append(options, rp.WithPKCE(cookieHandler))