Show active spool on klipper (if used)

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This only contains 1 feature request (if you have multiple feature requests, open one feature request for each feature request).
This issue is not a duplicate feature request of previous feature requests.

I want to show the current active spool in HA

Active spool can be achived by calling the klipper endpoint https://[klipper url]/server/spoolman/spool_id with a sample result:

{
    "result": {
        "spool_id": 28
    }
}

n/a

n/a

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