Verisure: Remove JSONPath, unique IDs, small cleanups

[frenck]

Proposed change

Another step in the Verisure integration cleanup/refactoring.

• Moves the DataUpdateCoordinator into its own file.
• Data is processed in the DataUpdateCoordinator, so it becomes easier to consume for Home Assistant.
• Removed the need/use of JSONPath.
• device_labels and such, are serial numbers (and referenced as such in Versisure now as well). Code adjusted to make that clear.
• Added Unique IDs based on the serial numbers (where possible at this point).
• Updated all available properties to take the DataUpdateCoordinator status into account.

This code is far from perfect, but is meant as a step forward. Got some more changes ready to go after this PR (e.g., Configuration flow with imports/discovery, devices, more unique IDs, lots more to clean up).

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
verisure:
  username: test
  password: welcome1

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:

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