docs: rework homepage and add aaif migration blog post (#8356)

Signed-off-by: Michael Neale <michael.neale@gmail.com>

documentation/src/theme/DocItem/Layout/index.tsx

@@ -393,7 +393,7 @@ function PageActionsMenu(): ReactNode {
   
   const handleViewMarkdown = () => {
     const source = metadata?.source?.replace('@site/', '') || '';
-    window.open(`https://raw.githubusercontent.com/block/goose/refs/heads/main/documentation/${source}`, '_blank');
+    window.open(`https://raw.githubusercontent.com/aaif-goose/goose/refs/heads/main/documentation/${source}`, '_blank');
     setDropdownOpen(false);
   };