📝 Document the WorkspaceCenter class

src/workspace-center.js

@@ -3,6 +3,7 @@
 const TextEditor = require('./text-editor')
 const PaneContainer = require('./pane-container')
 
+// Essential: Represents the workspace at the center of the entire window.
 module.exports = class WorkspaceCenter {
   constructor (params) {
     params.location = 'center'