Add VRChat and GitHub packages to Unity project

Assets/Udon/ReferenceDocs/_static/glpi.css

@@ -0,0 +1,13 @@
+.wy-side-nav-search > a, .wy-side-nav-search .wy-dropdown > a {
+   padding: 0;
+   margin: 0;
+}
+
+.wy-side-nav-search > div.version {
+   color: inherit;
+}
+
+.wy-side-nav-search > div.version > span.rtdversion {
+   color:rgba(255,255,255,0.3);
+   margin-left: .3em;
+}