[Feature Request]: Add Scan thresholds to libpax for range control

[caveman99]

Platform

ESP32

Description

libpax can be configured to only count stations with a certain signal strength during initialization. Add settings to customize these values via protobufs.

reference in lbpax: https://github.com/dbinfrago/libpax/blob/7bcd3fcab75037505be9b122ab2b24cc5176b587/lib/libpax/libpax_api.h#L37-L38