Joe arena z superchain mainnet (#5648)

## Problem solved

Short description of the bug fixed or feature added
Adding Arena-Z mainnet to OP Superchain grant page.

Linear
DASH-562

<!-- start pr-codex -->

---

## PR-Codex overview
This PR introduces updates related to the `Arena Z` network within the dashboard application, including configurations and UI adjustments.

### Detailed summary
- Added configuration for `Arena Z Mainnet` with properties `cta`, and `gasSponsored`.
- Included `Arena-Z` in the onboarding form's chain options.
- Updated the `superchain` page with `Arena-Z` details, changing the link to `/arena-z` and setting `isComingSoon` to `false`.

> ✨ Ask PR-Codex anything about this PR by commenting with `/codex {your question}`

<!-- end pr-codex -->

apps/dashboard/src/app/(dashboard)/(chain)/utils.ts

@@ -269,6 +269,11 @@ const chainMetaRecord = {
       buttonText: "Learn more",
     },
   },
+  //Arena Z Mainnet
+  7897: {
+    cta: OP_CTA,
+    gasSponsored: true,
+  },
   // B3 Mainnet
   8333: {
     headerImgUrl: thirdwebBanner.src,

apps/dashboard/src/components/onboarding/ApplyForOpCreditsForm.tsx

@@ -215,6 +215,7 @@ export const ApplyForOpCreditsForm: React.FC<ApplyForOpCreditsFormProps> = ({
               "Mantle",
               "Soneium",
               "Lisk",
+              "Arena-Z",
             ].map((chain) => ({
               label: chain === "Optimism" ? "OP Mainnet" : chain,
               value: chain,

apps/dashboard/src/pages/grant/superchain.tsx

@@ -102,9 +102,9 @@ const superchains = [
   {
     id: "Arena-Z",
     name: "ArenaZ",
-    link: "/arena-z-testnet",
+    link: "/arena-z",
     src: require("../../../public/assets/grant/superchain/icon-arena-z.png"),
-    isComingSoon: true,
+    isComingSoon: false,
   },
   {
     id: "campNetworkv2",