Add support for Aktobis WDH-214US dehumidifier (#5072)

* Add support for Aktobis WDH-214US dehumidifier

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

* Naming changes

- fault descriptions intended to be human readable, codes and "fault" not needed because they are all faults.
- Rename wordy binary_sensor to just "Filter" in common with other configs.

---------

Co-authored-by: Kai Jemella <kontakt@jemella.it>
Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>
Co-authored-by: Jason Rumney <make-all@users.noreply.github.com>

custom_components/tuya_local/devices/aktobis_wdh214us_dehumidifier.yaml

@@ -0,0 +1,89 @@
+name: Dehumidifier
+products:
+  - id: exdgi8inue5mnjvc
+    manufacturer: Aktobis
+    model: WDH-214US
+entities:
+  - entity: humidifier
+    class: dehumidifier
+    dps:
+      - id: 1
+        type: boolean
+        name: switch
+      - id: 2
+        type: integer
+        name: humidity
+        range:
+          min: 30
+          max: 90
+        mapping:
+          - step: 5
+      - id: 6
+        type: integer
+        name: current_humidity
+  - entity: fan
+    dps:
+      - id: 1
+        type: boolean
+        name: switch
+      - id: 4
+        type: string
+        name: speed
+        mapping:
+          - dps_val: low
+            value: 50
+          - dps_val: high
+            value: 100
+      - id: 8
+        type: boolean
+        name: oscillate
+  - entity: binary_sensor
+    class: problem
+    category: diagnostic
+    dps:
+      - id: 19
+        type: bitfield
+        name: sensor
+        mapping:
+          - dps_val: 0
+            value: false
+          - value: true
+      - id: 19
+        type: bitfield
+        name: description
+        mapping:
+          - dps_val: 0
+            value: OK
+          - dps_val: 1
+            value: "Temperature sensor"
+          - dps_val: 2
+            value: "Copper tube sensor"
+      - id: 19
+        type: bitfield
+        name: fault_code
+  - entity: binary_sensor
+    translation_key: tank_full
+    category: diagnostic
+    dps:
+      - id: 101
+        type: boolean
+        name: sensor
+  - entity: binary_sensor
+    translation_key: defrost
+    category: diagnostic
+    dps:
+      - id: 102
+        type: boolean
+        name: sensor
+  - entity: binary_sensor
+    name: Filter
+    category: diagnostic
+    # Triggers after 500 operating hours. This is a runtime counter,
+    # not an actual filter quality sensor. To reset after cleaning the
+    # air filter grille: press and hold the Swing button on the device
+    # for 15 seconds. The indicator on the device will stop glowing
+    # and DP 103 will return to false. Source: Aktobis product page.
+    dps:
+      - id: 103
+        type: boolean
+        name: sensor