add vscode commands for groups and snippets

applications/vscode.js

@@ -0,0 +1,16 @@
+/*Move between groups when multiple groups are set up in the window*/
+serenade.app("vscode").command("group <%direction%>", async (api, matches) => {
+    api.pressKey("k",["control"]);
+    api.pressKey(`${matches.direction}`,["control"]);
+});
+
+/*Insert a snippet (from VSCode or an extension) at the current position.
+It can be edited using Serenade's "system" command. The first match in the list
+of snippets is the snippet actually written in the document.*/
+serenade.app("vscode").command("snippet <%name%>", async (api, matches) => {
+    api.evaluateInPlugin("editor.action.insertSnippet");
+    setTimeout(function() {
+        api.typeText(matches.name);
+        api.pressKey("enter");
+    }, 500);
+});