Add device support for Bespoke Window AC (issue #87)

The AW06C7155EWAZ window air conditioner (modelNum
TP1X_DA_AC_WAC_01001_0000) reports no oneUiVersion and uses the '_WAC_'
(Window Air Conditioner) modelNum token instead of the '_RAC_'/'_PRAC_'
tokens already handled by for_device_by_model. Add a fallback rule for
that token, routing it to the existing airconditioner registry.

The device's resource surface (mode/convenient/wind/temperature/power/
filter/humidity) is already fully modeled by the airconditioner
capability set, so this is purely a detection-routing fix -- confirmed
against the issue #87 diagnostics dump with zero unbound hrefs.

custom_components/localthings/registry/by_type/__init__.py

@@ -122,6 +122,15 @@ def for_device_by_model(model_num: str, description: str) -> Optional[DeviceRegi
     # resource (see airconditioner.py's _AC_IGNORED).
     if key is None and '-CAWW-' in (model_num or '').upper():
         key = 'airconditioner'
+    # Window air conditioners (e.g. TP1X_DA_AC_WAC_01001_0000, issue #87)
+    # report no oneUiVersion and carry the '_WAC_' (Window Air Conditioner)
+    # token instead of '_RAC_'/'_PRAC_'. Same TP1X-class resource surface
+    # as the room-AC models above (mode/convenient/wind/temperature/power/
+    # filter/humidity all confirmed against the issue #87 dump binding
+    # cleanly against the existing airconditioner registry once routed
+    # here) -- no WAC-specific resources needed.
+    if key is None and '_WAC_' in (model_num or ''):
+        key = 'airconditioner'
     # Air purifiers (e.g. ARTIK051_TVTL_18K, issue #56) report no
     # oneUiVersion either, and carry the '_TVTL_' board-family token.
     if key is None and '_TVTL_' in (model_num or ''):