feat: Add qblox channels, to expose attenuation

src/qibolab/_core/instruments/qblox/channels.py

@@ -0,0 +1,22 @@
+from typing import Literal
+
+from qibolab._core.components import IqConfig
+
+__all__ = ["QbloxConfigs", "QbloxIq"]
+
+
+class QbloxIq(IqConfig):
+    """Microwave output channel config using Qblox."""
+
+    kind: Literal["qblox-iq"] = "qblox-iq"
+
+    attenuation: float = 0.0
+    """Output attenuation in dB.
+
+    For the specific case of ``out0``, cf.
+
+    - https://docs.qblox.com/en/main/api_reference/module.html#QCM_RF.out0_att
+    """
+
+
+QbloxConfigs = QbloxIq