Improve chain page Open graph metadata + image (#5081)

## Problem solved

Short description of the bug fixed or feature added

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## PR-Codex overview
This PR focuses on enhancing the Open Graph metadata and improving the layout of the `chainPage` component in the dashboard application.

### Detailed summary
- In `layout.tsx`, added an `openGraph` object containing `title` and `description`.
- In `opengraph-image.tsx`, added the `objectFit` property with the value `"contain"` for image styling.

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Author: MananTank

apps/dashboard/src/app/(dashboard)/(chain)/[chain_id]/(chainPage)/layout.tsx

@@ -46,6 +46,10 @@ export async function generateMetadata({
   return {
     title,
     description,
+    openGraph: {
+      title,
+      description,
+    },
   };
 }
 

apps/dashboard/src/app/(dashboard)/(chain)/[chain_id]/(chainPage)/opengraph-image.tsx

@@ -122,6 +122,7 @@ export default async function Image({
             right: -2,
             height: 150,
             width: 150,
+            objectFit: "contain",
           }}
         />
       )}