Add HA custom integration; fix bleak 3.x write-without-response regression

The OneControl panel's command characteristic is a streaming (Write Without
Response) endpoint. Bleak 3.x changed write_gatt_char to default to
write-with-response when the char advertises the "write" property, so every
command (incl. switch turn_on/off) got rejected by the panel with ATT 0x0E
(Unlikely Error), surfaced as BleakGATTProtocolError. Force response=False on
the command write (matching the auth key write) to restore control.

Also commits the productionized custom_components integration (config flow,
coordinator, switch/sensor/cover entities, key-seed TEA auth, COBS codec) and
the matching src/ RE client/COBS fixes (big-endian framing, table-driven CRC8,
status-event decoding) that were developed but never tracked.

Verified live on the campsite HAOS Pi: switch.exterior_lights / interior_lights
toggle the physical panel with no GATT error.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

custom_components/lippert_onecontrol/switch.py

@@ -0,0 +1,40 @@
+from homeassistant.components.switch import SwitchEntity
+from homeassistant.config_entries import ConfigEntry
+from homeassistant.core import HomeAssistant
+from homeassistant.helpers.entity_platform import AddEntitiesCallback
+from homeassistant.helpers.update_coordinator import CoordinatorEntity
+
+from .coordinator import OneControlCoordinator
+from .const import DOMAIN, SWITCH_DEVICES
+
+
+async def async_setup_entry(
+    hass: HomeAssistant, entry: ConfigEntry, async_add_entities: AddEntitiesCallback
+) -> None:
+    coordinator: OneControlCoordinator = hass.data[DOMAIN][entry.entry_id]
+    async_add_entities(
+        OneControlSwitch(coordinator, device_id, name)
+        for device_id, name in SWITCH_DEVICES.items()
+    )
+
+
+class OneControlSwitch(CoordinatorEntity, SwitchEntity):
+    def __init__(self, coordinator: OneControlCoordinator, device_id: int, name: str) -> None:
+        super().__init__(coordinator)
+        self._device_id = device_id
+        self._attr_name = name
+        self._attr_unique_id = f"{coordinator.address}_{device_id}"
+
+    @property
+    def is_on(self) -> bool | None:
+        return self.coordinator.get_switch_state(self._device_id)
+
+    @property
+    def available(self) -> bool:
+        return self.coordinator.is_connected
+
+    async def async_turn_on(self, **kwargs) -> None:
+        await self.coordinator.async_set_switch(self._device_id, True)
+
+    async def async_turn_off(self, **kwargs) -> None:
+        await self.coordinator.async_set_switch(self._device_id, False)