add chat basics

feature/updater/updater-common/src/commonMain/kotlin/UpdateFetcher.kt

@@ -0,0 +1,9 @@
+package ru.shadowsparky.updater.domain
+
+interface UpdateFetcher {
+    suspend fun fetch(versionCode: Long): UpdateInfo
+
+    companion object {
+        const val ARG_VERSION_CODE = "versionCode"
+    }
+}

feature/updater/updater-common/src/commonMain/kotlin/UpdateInfo.kt

@@ -0,0 +1,12 @@
+package ru.shadowsparky.updater.domain
+
+import kotlinx.serialization.Serializable
+
+@Serializable
+data class UpdateInfo(
+    val versionCode: Long? = null,
+    val versionName: String? = null,
+    val url: String? = null,
+    val changelog: String? = null,
+    val force: Boolean = false
+)