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/const.py

@@ -0,0 +1,25 @@
+DOMAIN = "lippert_onecontrol"
+
+# DevID → friendly name
+SWITCH_DEVICES = {
+    4: "Water Pump",
+    5: "Gas Water Heater",
+    6: "Exterior Lights",
+    7: "Interior Lights",
+}
+
+TANK_DEVICES = {
+    8: "Grey Tank 2",
+    9: "Grey Tank 1",
+    10: "Black Tank",
+    11: "Fresh Water Tank",
+}
+
+COVER_DEVICES = {
+    2: "Cover 2",  # slide or awning — confirm physically before renaming
+    3: "Cover 3",
+}
+
+KEEPALIVE_INTERVAL      = 20   # seconds between GetDevices keepalives
+MAX_KEEPALIVE_FAILURES  = 3    # consecutive failures before forcing reconnect
+RECONNECT_DELAYS        = [5, 10, 20, 60]  # seconds, last value repeats