Make node resource paths configurable via UI

## Current state

The resource properties shown per node (`versions`, `import-scripts`) are hardcoded in `BrokerNodeViewer.vue` (`RESOURCE_PATHS`). Adding or removing a resource path requires a code change.

## Proposal

- Add a global setting to manage node resource paths: add and remove entries via the UI (e.g. in the existing configuration dialog)
- Persist the list in the app configuration; the setting applies to all nodes
- `BrokerNodeViewer` reads the configured paths instead of the hardcoded list and appends the resulting cards as it does today
- Ship `versions` and `import-scripts` as defaults

Start by reading BrokerNodeViewer.vue and its RESOURCE_PATHS definition, then inspect the existing configuration dialog and app-configuration handling. Add a global UI-managed list with versions and import-scripts as defaults, persist it, and verify that BrokerNodeViewer renders cards from the configured paths for all nodes.

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