Add support for EASTtime D401 Water Purifier

[edwinyoo44]

This pull request introduces support for the EASTtime D401 Water Purifier by adding a new configuration file. The following features have been implemented:

• Device Information: Added basic information about the EASTtime D401, including manufacturer and model.
• Entities: Defined various entities for the water purifier, including:
  • Sensors for TDS In/Out, filter life levels, fault status, and total runtime.
  • Switches for UV sterilization and filter reset functionalities.
  • Buttons for filter cleaning and reset actions.
  • Select options for rinse modes.
• Data Points (DPS): Mapped the relevant data points for each entity, ensuring accurate data representation and control.
• Reset Buttons: The reset buttons for RO, CTO, PP, UDF, T33, and MFS filters are set to hidden: true by default to prevent accidental activation.

This addition enhances the functionality of the tuya-local component, allowing users to monitor and control their EASTtime D401 Water Purifier effectively.

Changes Made

• Created a new YAML configuration file for the EASTtime D401 Water Purifier located at easttime_d401_waterpurifier.yaml.

Testing

• Ensure that the new device configuration is loaded correctly and that all entities respond as expected.
• Verify that the data points are accurately reflecting the state of the water purifier.
• Confirm that the reset buttons remain hidden to avoid accidental activation.

Additional Notes

• Please review the configuration for any potential improvements or adjustments.
• Feedback on the entity definitions and mappings is welcome to ensure optimal performance.

[Copilot]

Pull Request Overview

This PR adds support for the EASTtime D401 water purifier by introducing a comprehensive device configuration file that maps various Tuya datapoints to Home Assistant entities.

Key Changes:

• Added complete device configuration with sensors, switches, buttons, and select entities
• Implemented filter life monitoring for multiple filter types (PP, CTO, RO, UDF, T33, MFS)
• Configured water quality monitoring with TDS sensors and status indicators

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[Copilot]

Spelling error: The hyphen in "Pure‑Water" appears to be a non-standard character (U+2011 non-breaking hyphen). Consider using a standard hyphen "-" for consistency, or consider rephrasing to "Pure Water" without a hyphen for better readability.

Suggested change

	value: "mode3(Micro Wastewater Pure‑Water Flashing Membrane)"
	value: "mode3(Micro Wastewater Pure-Water Flashing Membrane)"

[Copilot]

Spelling error: "Fliter" should be "Filter" to maintain consistency with other filter names in the configuration.

Suggested change

	name: PP Fliter Life Level
	name: PP Filter Life Level

[edwinyoo44]

Regarding the meaning of each Rinse Mode, the manufacturer explained the differences between modes 1-3 for this model.