Redesign for the v1 stable release (#3)

Only half done. Will continue in another PR.

Reviewed-on: #3

assets/icons/upload.svg

@@ -1,3 +1,3 @@
-<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" fill="none" viewBox="0 0 24 24">
-  <path fill="currentColor" fill-rule="evenodd" d="M2 4.75A2.75 2.75 0 0 1 4.75 2h8.5A2.75 2.75 0 0 1 16 4.75V8h3.25A2.75 2.75 0 0 1 22 10.75v8.5A2.75 2.75 0 0 1 19.25 22h-8.5A2.75 2.75 0 0 1 8 19.25V16H4.75A2.75 2.75 0 0 1 2 13.25v-8.5ZM14.5 8V4.75c0-.69-.56-1.25-1.25-1.25h-8.5c-.69 0-1.25.56-1.25 1.25v5.991l.983-.644a2.75 2.75 0 0 1 3.033.012l.5.334A2.75 2.75 0 0 1 10.75 8h3.75ZM5 6.25a1.25 1.25 0 1 1 2.5 0 1.25 1.25 0 0 1-2.5 0Zm8.39 6.292a.75.75 0 0 1 .766.027l2.8 1.8a.75.75 0 0 1 0 1.262l-2.8 1.8A.75.75 0 0 1 13 16.8v-3.6a.75.75 0 0 1 .39-.658Z" clip-rule="evenodd"/>
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none">
+<path d="M12 19.25V13L14.5 15.5" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/><path d="M12 13L9.5 15.5" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/><path d="M7.375 19.25H4.75C3.64543 19.25 2.75 18.3546 2.75 17.25V5.75C2.75 4.64543 3.64543 3.75 4.75 3.75H8.92963C9.59834 3.75 10.2228 4.0842 10.5937 4.6406L11.7031 6.3047C11.8886 6.5829 12.2008 6.75 12.5352 6.75H19.25C20.3546 6.75 21.25 7.64543 21.25 8.75V17.25C21.25 18.3546 20.3546 19.25 19.25 19.25H16.625" stroke="currentColor" stroke-width="1.5" stroke-linecap="round" stroke-linejoin="round"/>
 </svg>