Add refresh_node_info command to OZW websocket api

[cgarwood]

Proposed change

This PR adds a refresh_node_info command to the OZW websocket API. I had to re-structure the websocket_api file a bit to remove the class, as the websocket decorators didn't like being within a class.

Used for the frontend to provide feedback for the Refresh Node command.

Waiting for release of python-openzwave-mqtt 1.0.4

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

Additional information

• Frontend PR: Add OZW Refresh Node Dialog frontend#6530

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][dev-checklist]
• The code has been formatted using Black (black --fast homeassistant tests)
• Tests have been added to verify that the new code works.

[probot-home-assistant]

Hey there @marcelveldt, @MartinHjelmare, mind taking a look at this pull request as its been labeled with an integration (ozw) you are listed as a codeowner for? Thanks!
_{^{(message by CodeOwnersMention)}}

[MartinHjelmare]

Looks good!

[MartinHjelmare]

Great!