Add DNS helper modal and refactor domain handling components

- Introduced `DnsHelperModal` for guiding users on DNS configuration, including steps for adding A records and verifying configurations.
- Refactored domain handling by consolidating domain management into `handle-domain.tsx`, replacing the previous `add-domain.tsx`.
- Updated `ShowDomains` and related components to utilize the new domain handling structure, improving code organization and maintainability.
- Enhanced user experience by integrating domain validation and service selection features in the domain management interface.

apps/dokploy/server/api/routers/domain.ts

@@ -57,7 +57,10 @@ export const domainRouter = createTRPCRouter({
 			} catch (error) {
 				throw new TRPCError({
 					code: "BAD_REQUEST",
-					message: "Error creating the domain",
+					message:
+						error instanceof Error
+							? error.message
+							: "Error creating the domain",
 					cause: error,
 				});
 			}