Add ECO temp to Generic Thermostat

[Minims]

Proposed change

Add the preset ECO temperature in Generic Thermostat

Type of change

• [ ] Dependency upgrade
• [ ] Bugfix (non-breaking change which fixes an issue)
• [ ] New integration (thank you!)
• [x] New feature (which adds functionality to an existing integration)
• [ ] Deprecation (breaking change to happen in the future)
• [ ] Breaking change (fix/feature causing existing functionality to break)
• [ ] Code quality improvements to existing code or addition of tests

Additional information

• Link to documentation pull request: https://github.com/home-assistant/home-assistant.io/pull/31415

Checklist

• [x] The code change is tested and works locally.
• [x] Local tests pass. Your PR cannot be merged unless tests pass
• [ ] There is no commented out code in this PR.
• [ ] I have followed the development checklist
• [ ] I have followed the perfect PR recommendations
• [ ] The code has been formatted using Ruff (ruff format homeassistant tests)
• [x] Tests have been added to verify that the new code works.

If user exposed functionality or configuration variables are added/changed:

• [ ] Documentation added/updated for www.home-assistant.io

If the code communicates with devices, web services, or third-party tools:

• [ ] The manifest file has all fields filled out correctly.
  Updated and included derived files by running: python3 -m script.hassfest.
• [ ] New or updated dependencies have been added to requirements_all.txt.
  Updated by running python3 -m script.gen_requirements_all.
• [ ] For the updated dependencies - a link to the changelog, or at minimum a diff between library versions is added to the PR description.
• [ ] Untested files have been added to .coveragerc.

To help with the load of incoming pull requests:

• [ ] I have reviewed two other open pull requests in this repository.

[Minims]

I can't find the repo to update the documentation, Thx.

[PeteRager]

I can't find the repo to update the documentation, Thx.

https://github.com/home-assistant/home-assistant.io

[PeteRager]

We need to have a test added for this new preset to verify operation. I would put it here:

https://github.com/home-assistant/core/blob/2981d7ed0ec78f2271f5b6fac26a98d1b1b280df/tests/components/generic_thermostat/test_climate.py#L309

[Minims]

I have add :

• tests with Eco mode in Climate.
• PR in the documentation https://github.com/home-assistant/home-assistant.io/pull/31415