Add a feature flag for spaces. (#4429)

* Remove the huge conditional compilation block on AppSettings.

It is still required for the ElementCallBaseURL however.

* Add a feature flag for spaces.

ElementX/Sources/Application/Settings/OIDCConfiguration.swift

@@ -0,0 +1,34 @@
+//
+// Copyright 2024 New Vector Ltd.
+//
+// SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial
+// Please see LICENSE files in the repository root for full details.
+//
+
+import Foundation
+
+struct OIDCConfiguration {
+    let clientName: String
+    let redirectURI: URL
+    let clientURI: URL
+    let logoURI: URL
+    let tosURI: URL
+    let policyURI: URL
+    let staticRegistrations: [String: String]
+}
+
+#if canImport(MatrixRustSDK)
+import MatrixRustSDK
+
+extension OIDCConfiguration {
+    var rustValue: OidcConfiguration {
+        OidcConfiguration(clientName: clientName,
+                          redirectUri: redirectURI.absoluteString,
+                          clientUri: clientURI.absoluteString,
+                          logoUri: logoURI.absoluteString,
+                          tosUri: tosURI.absoluteString,
+                          policyUri: policyURI.absoluteString,
+                          staticRegistrations: staticRegistrations)
+    }
+}
+#endif