docs: docusaurus setup for v6 release (#2721)

* docs: docusaurus setup for v6 release

* docs: docusaurus setup for v6 release

* docs: fix vale issues

* docs: add v5 docs to v5 folder

Author: khushal87

docusaurus/reactnative-docusaurus-dontent-docs.plugin.js

@@ -3,23 +3,27 @@ module.exports = {
     [
       '@docusaurus/plugin-content-docs',
       {
-        lastVersion: 'current',
+        lastVersion: '5.x.x',
         versions: {
           current: {
+            label: 'v6',
+            path: 'v6',
+          },
+          '5.x.x': {
             label: 'v5',
           },
           '4.x.x': {
             label: 'v4',
             path: 'v4',
-            banner: 'unmaintained'
+            banner: 'unmaintained',
           },
           '3.x.x': {
             label: 'v3',
             path: 'v3',
-            banner: 'unmaintained'
-          }
-        }
-      }
-    ]
-  ]
-}
+            banner: 'unmaintained',
+          },
+        },
+      },
+    ],
+  ],
+};