Missing features for the v3 playground

[orta]

• The examples/whatisnew shortcut

 if (location.hash.startsWith("#show-examples")) {
 document.getElementById("examples").parentElement.children[0].click()
 }

 if (location.hash.startsWith("#show-whatisnew")) {
 document.getElementById("whatisnew").parentElement.children[0].click()
 }

• The nightly option (pre-release.json looks broken from make-monaco-builds)
• keyboard shortcuts
• about page which describes ^ and the playground goals
• config needs to be prettier
• check if examples read state works right