docs: milestones (#4593)

* docs: milestones

* fix: light mode

* feat: dates and links

* use item interface from timeline

* fix ssr build

* responseive design and styling

---------

Co-authored-by: martabal <74269598+martabal@users.noreply.github.com>
Co-authored-by: Alex Tran <alex.tran1502@gmail.com>

docs/docusaurus.config.js

@@ -101,6 +101,11 @@ const config = {
             position: 'right',
             label: 'Docs',
           },
+          {
+            to: '/milestones',
+            position: 'right',
+            label: 'Milestones',
+          },
           {
             to: '/docs/api',
             position: 'right',