Resume adding Z-Wave device if the page is refreshed

[MindFreeze]

Proposed change

If device inclusion is already in progress when the "zwave_js/add_node" is received, we subscribe to the controller events but if the "node added" has passed, we will not be subscribed to the node events. So the client will not know when the device inclusion ended.
This PR checks if inclusion is in progress and if there is already a node that hasn't finished the process. It then subscribes to the node events and sends "node added" event to the frontend so proper progress can be displayed.
The use case for this is refreshing the Configure page or reopening it after a crash, for example.

A frontend PR will follow to better utilize these changes but is not required for this to work. FE PR home-assistant/frontend#22519

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)
• Deprecation (breaking change to happen in the future)
• Breaking change (fix/feature causing existing functionality to break)
• Code quality improvements to existing code or addition of tests

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• This PR fixes or closes issue: fixes #
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[home-assistant]

Hey there @home-assistant/z-wave, mind taking a look at this pull request as it has been labeled with an integration (zwave_js) you are listed as a code owner for? Thanks!

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[MartinHjelmare]

Please add tests for the changed code.

[home-assistant]

Please take a look at the requested changes, and use the Ready for review button when you are done, thanks 👍

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[MartinHjelmare]

Thanks!