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).

Devices/lilygo-tdeck-max/devicetree.yaml

@@ -1,5 +1,6 @@
 dependencies:
   - Platforms/platform-esp32
+  - Drivers/sx126x-module
   - Drivers/xl9555-module
   - Drivers/cst66xx-module
   - Drivers/gdeq031t10-module