fix playground payments widget (#7607)

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## PR-Codex overview
This PR focuses on updating the `CodeGen` component in the `playground-web` application by renaming a prop for consistency and clarity.

### Detailed summary
- Changed the prop name from `token` to `tokenAddress` in the `CodeGen` component.
- Maintained existing conditional rendering for other props such as `seller`, `title`, `image`, `description`, `paymentMethods`, and `currency`.

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<!-- This is an auto-generated comment: release notes by coderabbit.ai -->

## Summary by CodeRabbit

* **Refactor**
  * Updated the generated code output to use the prop name `tokenAddress` instead of `token` when displaying the token address in the code example. This change does not affect any other visible functionality.

<!-- end of auto-generated comment: release notes by coderabbit.ai -->

Author: Yash094

apps/playground-web/src/app/connect/pay/components/CodeGen.tsx

@@ -73,7 +73,7 @@ function Example() {
     <${componentName}
       client={client}
       chain={defineChain(${options.payOptions.buyTokenChain.id})}
-      amount="${options.payOptions.buyTokenAmount}"${options.payOptions.buyTokenAddress ? `\n\t  token="${options.payOptions.buyTokenAddress}"` : ""}${options.payOptions.sellerAddress ? `\n\t  seller="${options.payOptions.sellerAddress}"` : ""}${options.payOptions.title ? `\n\t  ${options.payOptions.widget === "checkout" ? "name" : "title"}="${options.payOptions.title}"` : ""}${options.payOptions.image ? `\n\t  image="${options.payOptions.image}"` : ""}${options.payOptions.description ? `\n\t  description="${options.payOptions.description}"` : ""}${options.payOptions.paymentMethods && options.payOptions.paymentMethods.length > 0 ? `\n\t  paymentMethods={${JSON.stringify(options.payOptions.paymentMethods)}}` : ""}${options.payOptions.currency ? `\n\t  currency="${options.payOptions.currency}"` : ""}${
+      amount="${options.payOptions.buyTokenAmount}"${options.payOptions.buyTokenAddress ? `\n\t  tokenAddress="${options.payOptions.buyTokenAddress}"` : ""}${options.payOptions.sellerAddress ? `\n\t  seller="${options.payOptions.sellerAddress}"` : ""}${options.payOptions.title ? `\n\t  ${options.payOptions.widget === "checkout" ? "name" : "title"}="${options.payOptions.title}"` : ""}${options.payOptions.image ? `\n\t  image="${options.payOptions.image}"` : ""}${options.payOptions.description ? `\n\t  description="${options.payOptions.description}"` : ""}${options.payOptions.paymentMethods && options.payOptions.paymentMethods.length > 0 ? `\n\t  paymentMethods={${JSON.stringify(options.payOptions.paymentMethods)}}` : ""}${options.payOptions.currency ? `\n\t  currency="${options.payOptions.currency}"` : ""}${
         options.payOptions.widget === "transaction"
           ? `\n\t  transaction={claimTo({
         contract: nftContract,