ESPHome support for Beurer bluetooth BC 85

**Describe the problem you have/What new integration you would like**

Support to read blood pressure values from BC 85 via bluetooth

**Please describe your use case for this integration and alternatives you've tried:**

None

**Additional context**

I have the device and able to compile/write code, AND have written my own custom code to read values off this device before.
If there is somewhere to get me started on ESPHome, I will gladly write and PR the code. Thank you.

The request names the Beurer BC 85 and the goal of reading blood-pressure values over Bluetooth, but it does not identify repository files, tests, or an entry point. Start by locating the relevant ESPHome integration guidance and reviewing the reporter's existing custom code; done means the device's values can be read through a supported integration.

Written by the indexing model from the issue text.