Try splitting messages into api and impl modules

features/messages/api/.gitignore

@@ -0,0 +1 @@
+/build

features/messages/api/build.gradle.kts

@@ -0,0 +1,40 @@
+/*
+ * Copyright (c) 2022 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+// TODO: Remove once https://youtrack.jetbrains.com/issue/KTIJ-19369 is fixed
+@Suppress("DSL_SCOPE_VIOLATION")
+plugins {
+    id("io.element.android-compose-library")
+}
+
+android {
+    namespace = "io.element.android.features.messages.api"
+}
+
+dependencies {
+    implementation(projects.libraries.core)
+    implementation(projects.libraries.architecture)
+    implementation(projects.libraries.matrix)
+
+    testImplementation(libs.test.junit)
+    testImplementation(libs.coroutines.test)
+    testImplementation(libs.molecule.runtime)
+    testImplementation(libs.test.truth)
+    testImplementation(libs.test.turbine)
+    testImplementation(projects.libraries.matrixtest)
+
+    androidTestImplementation(libs.test.junitext)
+}

features/messages/api/src/main/kotlin/io/element/android/features/messages/api/MessagesEntryPoint.kt

@@ -0,0 +1,21 @@
+/*
+ * Copyright (c) 2023 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.element.android.features.messages.api
+
+import io.element.android.libraries.architecture.FeatureEntryPoint
+
+interface MessagesEntryPoint : FeatureEntryPoint