Create EnterpriseRemoteConfigSource enum

This allows us to decide where to get the remote enterprise config from.

libraries/wellknown/api/src/main/kotlin/io/element/android/libraries/wellknown/api/EnterpriseRemoteConfigSource.kt

@@ -0,0 +1,23 @@
+/*
+ * Copyright (c) 2026 Element Creations Ltd.
+ *
+ * SPDX-License-Identifier: AGPL-3.0-only OR LicenseRef-Element-Commercial.
+ * Please see LICENSE files in the repository root for full details.
+ */
+
+package io.element.android.libraries.wellknown.api
+
+/**
+ * The source from which the enterprise remote configuration is retrieved.
+ */
+enum class EnterpriseRemoteConfigSource {
+    /**
+     * Retrieve the enterprise remote configuration from the Element Server Suite configuration (ESS_CONFIG) endpoint.
+     */
+    ESS_CONFIG,
+
+    /**
+     * Retrieve the enterprise remote configuration from the Element server's well-known endpoint.
+     */
+    WELLKNOWN_ENDPOINT,
+}