Add support for learning RF commands with Broadlink remotes

[felipediel]

Proposed change

This PR adds support for learning RF commands with Broadlink devices. These are the proposed changes:

• Create a method for learning RF commands. This method will be called when the user specifies command_type: rf in remote.learn_command service.
• The method for learning IR commands remains as a default option. The user can also make it explicit by calling remote.learn_command with command_type: ir.

Type of change

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

Example entry for configuration.yaml:

# Example configuration.yaml
script:
  learn_car_lock:
    sequence:
      - service: remote.learn_command
        data:
          entity_id: remote.garage
          device: car
          command: unlock
          command_type: rf

Additional information

• This PR fixes or closes issue: fixes Learning doesn't work on Broadlink RM2 Pro Plus_300 #37055 Broadlink RM4 PRO is not able to learn or to send RF Signal mjg59/python-broadlink#358
• This PR is related to issue:
• Link to documentation pull request: Add support for learning RF commands with Broadlink remotes home-assistant.io#14398

Checklist

• The code change is tested and works locally.
• 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
• The code has been formatted using Black (black --fast homeassistant tests)
• 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.
• Untested files have been added to .coveragerc.

The integration reached or maintains the following Integration Quality Scale:

• No score or internal
• 🥈 Silver
• 🥇 Gold
• 🏆 Platinum

To help with the load of incoming pull requests:

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

[probot-home-assistant]

Hey there @Danielhiversen, mind taking a look at this pull request as its been labeled with an integration (broadlink) you are listed as a codeowner for? Thanks!
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[stale]

There hasn't been any activity on this pull request recently. This pull request has been automatically marked as stale because of that and will be closed if no further activity occurs within 7 days.
Thank you for your contributions.

[elupus]

I think this looks alright

[springstan]

Just some small comments ✌️

[felipediel]

It's better now. Thanks, guys.

[springstan]

Looks good 👍