Add possibility to manually enable blocked state

[PiotrMachowski]

Description

This pull requests adds entity_controller.enable_block service that allows to manually enable blocked state.

Thanks to this feature it will be possible to prevent entity from being automatically turned off - in my use case I use it to block light in a bathroom when its door is closed and a presence of a person inside is detected (e.g. by clicking a button).

Checklist

• [x] The PR title is clear, concise and follows conventional commit formatting.
• [x] Double-check your branch is based on develop and targets develop
• [x] Issue raised to compliment this PR (if no pre-existing issue exists)
• [x] Code is commented, particularly in hard-to-understand areas and relevant issues are referenced.
• [x] Documentation repository updated to reflect new features or changes in behaviour (VERY IMPORTANT, undocumented features cannot be discovered and used!) (https://github.com/danobot/ec-docs/pull/7)
• [x] Description explains the issue/use-case resolved and auto-closes related issues.
• [x] Breaking changes or changes in behaviour are called out and discussed in separate issues.
• [x] Testing of new changes completed by person who raised the issue.

Please open an issue before embarking on any significant pull request, especially those that add a new library or change existing tests, otherwise you risk spending a lot of time working on something that might not end up being merged into the project.

License

By submitting a patch, you agree to allow the project owners to license your work under the terms of the project license. Thank you for contributing!

Related Issues

Closes #237, #277

[hvorragend]

Perfect. This works great for me.

[danobot]

Testing on my instance and will merge if all good. Thanks

[danobot]

Merged and released, thank you for your contribution. If there is anything to document, please update the documentation repo and I'll merge that as well.