docs: add "getting started" section for the browser mode

Author: sheremet-va

docs/.vitepress/config.ts

@@ -180,6 +180,11 @@ export default ({ mode }: { mode: string }) => {
             link: '/guide/browser/why',
             docFooterText: 'Why Browser Mode? | Browser Mode',
           },
+          {
+            text: 'Getting Started',
+            link: '/guide/browser/',
+            docFooterText: 'Getting Started | Browser Mode',
+          },
           {
             text: 'Context API',
             link: '/guide/browser/context',