Add charger status for MER charging network

🚧 THIS IS A TICKET MIGRATED FROM UPVOTY. The original ticket and comments will be available for a limited time over at:
https://abrp.upvoty.com/b/add-a-charge-card-network/add-charger-status-for-mer-charging-network/
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I use MER a lot here in Sweden and the status of the chargers are available in e.g. the ChargeFinder app but not (or at least very rarely) in ABPR.