add design to big player

src/components/Viewer.svelte

@@ -15,6 +15,7 @@
         ></YoutubePlayer>
 
         <div class="playerBig__overlay" on:click={() => $paused = !$paused}></div>
+        <button class="playerBig__reduce">Reduce<IconReduce></IconReduce></button>
     </div>
 
     {#if !ready}
@@ -31,6 +32,7 @@
 
 <script>
     import { get } from 'svelte/store'
+    import IconReduce from '/components/icons/player/Reduce.svelte'
     import YoutubePlayer from '/components/YoutubePlayer'
     import Progress from '/components/player/Progress'
     import { paused, muted, volume, current, selectNext, loading } from '/store.js'