feat: device authorization RFC 8628 (#5646)

* device auth: implement the write events

* add grant type device code

* fix(init): check if default value implements stringer

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Co-authored-by: adlerhurst <silvan.reusser@gmail.com>

internal/api/oidc/client_converter.go

@@ -200,6 +200,8 @@ func grantTypeToOIDC(grantType domain.OIDCGrantType) oidc.GrantType {
 		return oidc.GrantTypeImplicit
 	case domain.OIDCGrantTypeRefreshToken:
 		return oidc.GrantTypeRefreshToken
+	case domain.OIDCGrantTypeDeviceCode:
+		return oidc.GrantTypeDeviceCode
 	default:
 		return oidc.GrantTypeCode
 	}