zwave-js / zwave-js-ui / 25310376024

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feat(hass): add suggested_area from node location (#4627)

This fixes https://github.com/zwave-js/zwave-js-ui/issues/4047

## Summary

This PR adds an optional Home Assistant MQTT discovery enhancement that
publishes a node's Z-Wave `Location` as `device.suggested_area`.

The feature is exposed as a new setting under the existing Home
Assistant / MQTT Discovery section and is disabled by default, so
current behavior does not change unless explicitly enabled.

## What Changed

- Added a new gateway setting: `useLocationAsSuggestedArea`
- Added a Settings UI toggle:
  - `Use node location as suggested area`
- Updated MQTT discovery payload generation so that, when enabled:
  - `node.loc` is trimmed
  - non-empty values are published as `device.suggested_area`
  - empty or missing locations are ignored

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