feat: zwave-js server support

[robertsLando]

No description provided.

[ahochsteger]

@robertsLando would this be the solution to restart the UI of zwavejs2mqtt without re-discovering all nodes?
I guess the zwave-js server would then run in a separate Docker container than zwavejs2mqtt.
If there's something I can do to make this happen (e.g. do some tests or help with Docker setup) just let me know.

[balloob]

@ahochsteger that is not what this PR is about. This is about also exposing a websocket connection for other applications that want access to the Z-Wave JS driver.

[ahochsteger]

@balloob ah, I see - thanks for clarifying!

[coveralls]

Pull Request Test Coverage Report for Build 496446205

• 0 of 17 (0.0%) changed or added relevant lines in 2 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage decreased (-0.04%) to 23.535%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
src/store/mutations.js	0	3	0.0%
lib/ZwaveClient.js	0	14	0.0%

Totals
Change from base Build 496408693:	-0.04%
Covered Lines:	1958
Relevant Lines:	8499

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💛 - Coveralls