feat: expose utilityWalletAddress and refillingWallets in /wallets response (#17)

* feat: expose utilityWalletAddress and refillingWallets in /wallets response

The inventory manager already reads these fields to display bundler
config in the dashboard. This sends them from the server config.

* chore: format

---------

Co-authored-by: SahilVasava <24778390+SahilVasava@users.noreply.github.com>

Author: SahilVasava

src/rpc/server.ts

@@ -186,7 +186,9 @@ export class Server {
             )
             await reply.status(200).send({
                 wallets,
-                chainId: this.config.chainId
+                chainId: this.config.chainId,
+                utilityWalletAddress: this.config.utilityWalletAddress,
+                refillingWallets: this.config.refillingWallets
             })
         } catch {
             await reply