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/config_flow.py

@@ -0,0 +1,53 @@
+import re
+import voluptuous as vol
+from homeassistant import config_entries
+from homeassistant.components.bluetooth import async_ble_device_from_address
+from homeassistant.data_entry_flow import FlowResult
+
+from .client.onecontrol_client import OneControlClient
+from .const import DOMAIN
+
+_MAC_RE = re.compile(r"^([0-9A-F]{2}:){5}[0-9A-F]{2}$")
+
+
+class OneControlConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
+    VERSION = 1
+
+    async def async_step_user(self, user_input: dict | None = None) -> FlowResult:
+        errors: dict[str, str] = {}
+
+        if user_input is not None:
+            address = user_input["address"].strip().upper()
+
+            if not _MAC_RE.match(address):
+                errors["address"] = "invalid_mac"
+            else:
+                await self.async_set_unique_id(address)
+                self._abort_if_unique_id_configured()
+
+                ble_device = async_ble_device_from_address(self.hass, address)
+                connected = False
+                for _ in range(2):
+                    client = OneControlClient(address, ble_device=ble_device)
+                    try:
+                        await client.connect()
+                        await client.disconnect()
+                        connected = True
+                        break
+                    except Exception:
+                        pass
+                if not connected:
+                    errors["base"] = "cannot_connect"
+                else:
+                    return self.async_create_entry(
+                        title=f"OneControl ({address})",
+                        data={"address": address},
+                    )
+
+        return self.async_show_form(
+            step_id="user",
+            data_schema=vol.Schema({
+                vol.Required("address", description={"suggested_value": "30:C6:F7:E0:80:8E"}): str,
+            }),
+            errors=errors,
+        )