Split pages and commands into editable modules

src/pages/about.js

@@ -0,0 +1,10 @@
+import { wrap } from '../terminal.js';
+
+export const name = 'about';
+export const title = 'About';
+
+// Edit this function to customize your About page.
+export function render({ config }) {
+  const persona = config.persona || {};
+  return wrap((persona.about || 'Tell visitors who you are.') + '\n\n' + (persona.bio || 'This is your space on the internet.')).join('\n');
+}