Create dm timeline nav graph

core/src/main/res/navigation/dm_timeline_nav_graph.xml

+<?xml version="1.0" encoding="utf-8"?>
+<navigation xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:id="@+id/dm_timeline_nav_graph"
+    app:startDestination="@id/DMTimelineDialogFragment">
+
+    <dialog
+        android:id="@+id/DMTimelineDialogFragment"
+        android:name="org.futo.circles.core.feature.direct.DMTimelineDialogFragment"
+        tools:layout="@layout/dialog_fragment_dm_timeline">
+
+        <argument
+            android:name="roomId"
+            app:argType="string"
+            app:nullable="false" />
+
+    </dialog>
+</navigation>
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