Support for non-Latin characters and Emojis

[valaz]

The Problem: Currently, non-Latin characters and Emojis arrive as garbled text or ????. This happens because the gateway defaults to GSM-7 encoding instead of Unicode (UCS-2).

The Solution: Setting "Unicode": True in the smsinfo dictionary within run.py fixes this. I have manually verified that forcing this flag allows all non-Latin symbols and Emojis to be delivered correctly.

smsinfo = {
    "Class": -1,
    "Unicode": True, # args.get('unicode') if args.get('unicode') else False,
    "Entries": [
        {
            "ID": "ConcatenatedTextLong",
            "Buffer": args['text'],
        }
    ],
}

The Request: Could you add a configuration option to the Home Assistant integration to enable Unicode support?