feat(tsconnect): add getCert, listenTLS, setFunnel + fix TLS cert for WASM

Enable ACME TLS certificates on js/wasm by dropping the !js build tag from
cert.go and routing storage through the state store. Add getCert, listenTLS,
and setFunnel WASM bindings with a combinedTLSListener that merges Funnel
ingress and direct tailnet connections. Notify the control plane immediately
after serve config changes to accelerate Funnel DNS provisioning.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

ipn/ipnlocal/serve.go

@@ -393,6 +393,11 @@ func (b *LocalBackend) setServeConfigLocked(config *ipn.ServeConfig, etag string
 		}
 	}
 
+	// Notify the control plane immediately so that changes to IngressEnabled /
+	// WireIngress (required for Funnel DNS provisioning) are not delayed until
+	// the next periodic heartbeat.
+	b.authReconfigLocked()
+
 	return nil
 }