Add support for l10wfe gas water heater (#4921)

* Create l10wfe_gas_waterheater.yaml

* fix precision and removed unused dps

* removed problem

* homekit doesn't support water heater, changed to climate

* Revert "homekit doesn't support water heater, changed to climate"

This reverts commit d3899bdb660712260114b5e9002b9bbd2912fd40.

* resolved comments

* fix (cityenergy_l10wfe_gaswaterheater): naming and class tweaks

- follow filename convention brand_model_type.yaml
- remove name from cumulative gas and water sensors to allow HA translations to show through.
- revert change of session gas and water sensor classes, as gas and water classes cannot be used with measurement state class.

PR #4921

* fix(cityenergy_l10wfe_gaswaterheater): remove category from main sensors

Removed 'diagnostic' category from gas and water sensors.

---------

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

custom_components/tuya_local/devices/cityenergy_l10wfe_gaswaterheater.yaml

@@ -0,0 +1,113 @@
+name: Gas water heater
+products:
+  - id: di9ybnrv3s2d1axk
+    manufacturer: City Energy
+    model: L10WFE
+entities:
+  - entity: water_heater
+    dps:
+      - id: 1
+        type: boolean
+        name: operation_mode
+        mapping:
+          - dps_val: false
+            value: "off"
+          - dps_val: true
+            value: gas
+      - id: 9
+        type: integer
+        name: temperature
+        unit: C
+        range:
+          min: 35
+          max: 55
+      - id: 10
+        type: integer
+        name: current_temperature
+        unit: C
+  - entity: sensor
+    class: enum
+    translation_key: status
+    category: diagnostic
+    dps:
+      - id: 13
+        type: string
+        name: sensor
+        mapping:
+          - dps_val: standby
+            value: standby
+          - dps_val: burning
+            value: heating
+  - entity: sensor
+    class: volume_flow_rate
+    category: diagnostic
+    dps:
+      - id: 21
+        type: integer
+        name: sensor
+        unit: L/min
+        class: measurement
+  - entity: sensor
+    name: Session runtime
+    class: duration
+    category: diagnostic
+    dps:
+      - id: 22
+        type: integer
+        name: sensor
+        unit: min
+        class: measurement
+  - entity: sensor
+    name: Session gas
+    class: volume
+    category: diagnostic
+    dps:
+      - id: 103
+        type: integer
+        name: sensor
+        unit: m³
+        class: measurement
+        mapping:
+          - scale: 1000
+  - entity: sensor
+    class: gas
+    dps:
+      - id: 104
+        type: integer
+        name: sensor
+        unit: m³
+        class: total_increasing
+  - entity: sensor
+    name: Session water
+    class: volume
+    category: diagnostic
+    dps:
+      - id: 105
+        type: integer
+        name: sensor
+        unit: L
+        class: measurement
+  - entity: sensor
+    class: water
+    dps:
+      - id: 106
+        type: integer
+        name: sensor
+        unit: m³
+        class: total_increasing
+  - entity: button
+    name: Reset water meter
+    category: config
+    hidden: true
+    dps:
+      - id: 107
+        type: boolean
+        name: button
+  - entity: button
+    name: Reset gas meter
+    category: config
+    hidden: true
+    dps:
+      - id: 108
+        type: boolean
+        name: button