온보딩 튜토리얼 추가

app/src/main/res/layout/fragment_onboarding.xml

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="utf-8"?>
+<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:id="@+id/rl_root"
+    xmlns:tools="http://schemas.android.com/tools"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:background="@color/color_ccf0ff">
+
+    <ImageView
+        android:id="@+id/image_view"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:contentDescription="@null"
+        tools:src="@drawable/img_guide_1" />
+
+</RelativeLayout>