Add NEEY active balancer support

[NAP141]

Checklist

• I have filled out the template to the best of my ability.
• I have understood that this integration is only about battery management systems with Bluetooth Low Energy support.
• 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 of any previous feature requests.

Please describe the enhancement you would like to have.

NEEY is a very popular Active Balancer. In some forums it states that it is equivalent to Heltec. Android Store app is called NEEY

Additional context

Some work has been done at ESPHome level here: https://github.com/syssi/esphome-jk-bms
in specifics here: https://github.com/syssi/esphome-jk-bms/tree/main/components/heltec_balancer_ble
However this did not work for me when replacing my esp32 ble-proxy with it.

Service explorer:
[Service] 00001800-0000-1000-8000-00805f9b34fb (Handle: 1): Generic Access Profile
[Characteristic] 00002a00-0000-1000-8000-00805f9b34fb (Handle: 2): Device Name (read), Value: bytearray(b'EK-24S4EB')
[Characteristic] 00002a01-0000-1000-8000-00805f9b34fb (Handle: 4): Appearance (read), Value: bytearray(b'\x00\x00')
[Characteristic] 00002a04-0000-1000-8000-00805f9b34fb (Handle: 6): Peripheral Preferred Connection Parameters (read), Value: bytearray(b'\x10\x00\x10\x00\x00\x00,\x01')
[Service] 0000ffe0-0000-1000-8000-00805f9b34fb (Handle: 8): Vendor specific
[Characteristic] 0000ffe1-0000-1000-8000-00805f9b34fb (Handle: 9): Vendor specific (write-without-response,write,notify), Max write w/o rsp size: 514
[Descriptor] 00002902-0000-1000-8000-00805f9b34fb (Handle: 11): Client Characteristic Configuration, Value: bytearray(b'\x01\x00')
[Characteristic] 0000ffe2-0000-1000-8000-00805f9b34fb (Handle: 12): Vendor specific (write-without-response,write,notify), Max write w/o rsp size: 514
[Descriptor] 00002902-0000-1000-8000-00805f9b34fb (Handle: 14): Client Characteristic Configuration, Value: bytearray(b'\x01\x00')
[Characteristic] 0000ffe3-0000-1000-8000-00805f9b34fb (Handle: 15): Vendor specific (write-without-response,write), Max write w/o rsp size: 514

A youtube review here:
https://www.youtube.com/watch?v=jpG3siEzll8
note that in this review Device Name starts with "GW"

[patman15]

Hi! Thanks for the request. I guess this can be done, but I need to work through my queue of request before I can have a look. I'll come back to this issue as soon as I can spare some time.

[NAP141]

Thank you! There is an ongoing issue request with a lot more info here:
syssi/esphome-jk-bms#640