Refactor Namron Thermostat Converters to Use Typed Cluster Definitions

[svhelge]

Added addNamronHvacThermostatCluster() extension that defines custom Namron HVAC thermostat attributes.
Moved namron_thermostat converter from generic converters to the namron library with typed attributes.

[Koenkk]

will merge after the hotfix release

[Copilot]

Pull request overview

Refactors Namron thermostat handling by moving the namron_thermostat converter into the Namron library and switching it to typed attribute names backed by a device-added custom hvacThermostat cluster definition.

Changes:

• Added namronExtend.addNamronHvacThermostatCluster() to register Namron/Sunricher manufacturer-specific thermostat attributes by name.
• Moved namron_thermostat from generic from/toZigbee converters into src/lib/namron.ts and updated affected device definitions to reference it.
• Removed the legacy namron_thermostat exports from src/converters/fromZigbee.ts and src/converters/toZigbee.ts.

Reviewed changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 1 comment.

Show a summary per file

File	Description
src/lib/namron.ts	Introduces typed hvacThermostat attribute definitions and hosts the moved Namron thermostat converters.
src/devices/sunricher.ts	Updates Sunricher thermostat definitions to use the Namron library converter and registers the custom thermostat cluster.
src/devices/namron.ts	Updates Namron thermostat definitions similarly and refactors the Simplify remote converter into fzLocal.
src/converters/toZigbee.ts	Removes the legacy tz.namron_thermostat converter from generic converters.
src/converters/fromZigbee.ts	Removes the legacy fz.namron_thermostat converter from generic converters.

[Koenkk]

Thanks!