add basic pdf reader

src/plugins/pdfPlayer/style.css

@@ -0,0 +1,25 @@
+#pdfPlayer {
+    position: relative;
+    height: 100%;
+    width: 100%;
+    overflow: none;
+    z-index: 100;
+    background: #fff;
+}
+
+#canvas {
+    display: block;
+    margin: auto;
+}
+
+.actionButtons {
+    right: 0.5vh;
+    top: 0.5vh;
+    z-index: 1002;
+    position: absolute;
+}
+
+.actionButtonIcon {
+    color: black;
+    opacity: 0.7;
+}