feat: refactor sgclaw around zeroclaw compat runtime

third_party/zeroclaw/firmware/uno-q-bridge/sketch/sketch.ino

@@ -0,0 +1,24 @@
+// ZeroClaw Bridge — expose digitalWrite/digitalRead for agent GPIO control
+// SPDX-License-Identifier: MPL-2.0
+
+#include "Arduino_RouterBridge.h"
+
+void gpio_write(int pin, int value) {
+  pinMode(pin, OUTPUT);
+  digitalWrite(pin, value ? HIGH : LOW);
+}
+
+int gpio_read(int pin) {
+  pinMode(pin, INPUT);
+  return digitalRead(pin);
+}
+
+void setup() {
+  Bridge.begin();
+  Bridge.provide("digitalWrite", gpio_write);
+  Bridge.provide("digitalRead", gpio_read);
+}
+
+void loop() {
+  Bridge.update();
+}