Restore top banner (webinar Feb 25); Get support after prod, restore Slack/contribute content

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: NoyaOffer

docs/docs.json

@@ -456,8 +456,8 @@
               "oss/quickstart/quickstart-report",
               "oss/quickstart/stay-updated",
               "oss/quickstart/quickstart-alerts",
-              "oss/quickstart/quickstart-support",
-              "oss/quickstart/quickstart-prod"
+              "oss/quickstart/quickstart-prod",
+              "oss/quickstart/quickstart-support"
             ]
           },
           {
@@ -610,6 +610,10 @@
       "href": "https://join.slack.com/t/elementary-community/shared_invite/zt-38gg3xy5u-exKL8vkQpoFkng0MAzt1Pg"
     }
   },
+  "banner": {
+    "content": "[What does it require to build your data platform for AI agents? Join the webinar, Feb 25th, 11 AM EST.](https://www.elementary-data.com/webinar/how-to-prepare-your-data-platform-for-analytics-agents)",
+    "dismissible": false
+  },
   "search": {
     "prompt": "Ask me anything..."
   },

docs/oss/quickstart/quickstart-support.mdx

@@ -1 +1,20 @@
+---
+title: "Quickstart: Get support"
+sidebarTitle: "Get support"
+icon: "square-8"
+---
 
+**Join our [Slack community](https://elementary-data.com/community) to get support, stay updated, and connect with other Elementary users.**
+
+Our Slack community is a great place to:
+- Stay updated on releases
+- Get support from our AI, team, and thousands of peers
+- Connect with other Elementary users
+- Learn about use cases and what's going on in Elementary
+
+## Want to contribute?
+
+Want to make a contribution for an integration you're missing or any new feature or fix? We appreciate it!
+
+- Reach out in [Slack](https://elementary-data.com/community) or email us at support@elementary-data.com
+- Learn more about contributing [here](/oss/general/contributions)