Response viewer for PDF (#48)

This PR adds a response viewer for PDF files using `react-pdf`

src-web/main.css

@@ -26,6 +26,10 @@
     @apply select-none cursor-default;
   }
 
+  .select-all * {
+    /*@apply select-all;*/
+  }
+
   a,
   a[href] * {
     @apply cursor-pointer !important;