init ChannelList component

+import React from "react";
+import styled from "styled-components";
+import { Link } from "react-router-dom";
+
+const ChannelContainer = styled.div``;
+
+const ChannelList = styled.ul``;
+
+const ChannelItem = styled.li``;
+
+const CreateContainer = styled.div``;
+
+export default () => {
+  return (
+    <>
+      <ChannelContainer>
+        <ChannelList>
+          <ChannelItem>First Channel</ChannelItem>
+        </ChannelList>
+      </ChannelContainer>
+      <CreateContainer>
+        <Link to="/">Create New Channel</Link>
+      </CreateContainer>
+    </>
+  );
+};