LoRa device type + SX1262 kernel driver (first checkpoint) (#565)

Adds sub-GHz radio support to Tactility as a first-class kernel device type, plus a
driver for the Semtech SX1262. Continues the radio work discussed in #342, brought up to
the current kernel driver model (rather than the deprecated tt::hal layer the earlier
prototype targeted).

Drivers/sx126x-module/source/module.cpp

@@ -0,0 +1,19 @@
+// SPDX-License-Identifier: Apache-2.0
+#include <tactility/driver.h>
+#include <tactility/module.h>
+
+extern "C" {
+
+extern Driver sx1262_driver;
+
+static Driver* const sx126x_drivers[] = {
+    &sx1262_driver,
+    nullptr
+};
+
+Module sx126x_module = {
+    .name = "sx126x",
+    .drivers = sx126x_drivers
+};
+
+} // extern "C"