Add support for Kogan heater fan (#5723)

Adds support for the Kogan heater fan.

It is a fan heater with `heat` and `fan_only` modes, oscillation, a
countdown
timer, sound toggle and a 0-2 heat level. dp 1 is the main power switch
and
dp 101 selects between heating and fan-only, so `hvac_mode` is mapped
from
dp 1 with a condition on dp 101.

Tested against a physical device on protocol 3.4. All 12 dps the device
reports are covered by the config, and it matches at 100% quality.

I have not included a `products:` block as I do not have a reliable
product id
for this device; it matches on dps.

---------

Co-authored-by: Claude Opus 5 <noreply@anthropic.com>
Co-authored-by: Jason Rumney <make-all@users.noreply.github.com>

custom_components/tuya_local/devices/kogan_heater_fan.yaml

@@ -0,0 +1,110 @@
+name: Heater fan
+entities:
+  - entity: fan
+    dps:
+      - id: 1
+        type: boolean
+        name: switch
+      - id: 3
+        type: integer
+        name: speed
+        range:
+          min: 1
+          max: 9
+      - id: 2
+        type: string
+        name: preset_mode
+        mapping:
+          - dps_val: normal
+            value: none
+          - dps_val: strong
+            value: boost
+      - id: 5
+        type: boolean
+        name: oscillate
+  - entity: climate
+    translation_key: heater
+    dps:
+      - id: 1
+        type: boolean
+        name: available
+      - id: 101
+        type: boolean
+        name: hvac_mode
+        mapping:
+          - dps_val: false
+            value: "off"
+          - dps_val: true
+            value: heat
+      - id: 20
+        type: integer
+        name: temperature
+        range:
+          min: 15
+          max: 35
+        unit: C
+      - id: 21
+        type: integer
+        name: current_temperature
+      - id: 102
+        type: integer
+        name: preset_mode
+        mapping:
+          - dps_val: 0
+            value: low
+          - dps_val: 1
+            value: medium
+          - dps_val: 2
+            value: high
+  - entity: switch
+    translation_key: sound
+    category: config
+    dps:
+      - id: 13
+        type: boolean
+        name: switch
+  - entity: select
+    translation_key: timer
+    category: config
+    dps:
+      - id: 22
+        type: string
+        name: option
+        mapping:
+          - dps_val: cancel
+            value: cancel
+          - dps_val: 1h
+            value: 1h
+          - dps_val: 2h
+            value: 2h
+          - dps_val: 3h
+            value: 3h
+          - dps_val: 4h
+            value: 4h
+          - dps_val: 5h
+            value: 5h
+          - dps_val: 6h
+            value: 6h
+  - entity: sensor
+    translation_key: time_remaining
+    class: duration
+    category: diagnostic
+    dps:
+      - id: 23
+        type: integer
+        name: sensor
+        unit: min
+  - entity: binary_sensor
+    class: problem
+    category: diagnostic
+    dps:
+      - id: 24
+        type: bitfield
+        name: sensor
+        mapping:
+          - dps_val: 0
+            value: false
+          - value: true
+      - id: 24
+        type: bitfield
+        name: fault_code