Expand typed firewall and map API

src/LibNftables/NftablesClient.cs

@@ -63,6 +63,10 @@ public sealed class NftablesClient : INftablesClient
         return Validate(CreateTypedRequest(ruleset), ct);
     }
 
+    /// <inheritdoc />
+    public string RenderRuleset(NftRuleset ruleset)
+        => NftRulesetRenderer.Render(ruleset);
+
     /// <inheritdoc />
     public Task<NftValidationResult> ValidateAsync(NftApplyRequest request, CancellationToken ct = default)
         => Task.FromResult(Validate(request, ct));