start adding of posts view

services/posts/client/src/commonMain/kotlin/dev/inmo/postssystem/services/posts/client/ui/posts_list/PostsListUIState.kt

@@ -0,0 +1,15 @@
+package dev.inmo.postssystem.services.posts.client.ui.posts_list
+
+import dev.inmo.postssystem.features.posts.common.Post
+import kotlinx.serialization.Serializable
+
+@Serializable
+sealed class PostsListUIState {
+    @Serializable
+    object Loading : PostsListUIState()
+    @Serializable
+    data class Show(
+        val posts: List<Post>
+    ) : PostsListUIState()
+
+}