feat: 메인 라이브

- 라이브 예약 중 UI 변경

app/src/main/res/drawable/date_month_background.xml

@@ -0,0 +1,10 @@
+<?xml version="1.0" encoding="utf-8"?>
+<shape xmlns:android="http://schemas.android.com/apk/res/android"
+    android:shape="rectangle">
+    <solid android:color="#FF5C49" />
+    <corners
+        android:topLeftRadius="16dp"
+        android:topRightRadius="16dp"
+        android:bottomLeftRadius="0dp"
+        android:bottomRightRadius="0dp" />
+</shape>