* Initial work to get NimbleBluetooth working reliably, and cross-task mutexes cleaned up
* Pre-fill toPhoneQueue when safe (during config/nodeinfo): runOnceToPhoneCanPreloadNextPacket
* Handle 0-byte responses breaking clients during initial config phases
* requestLowerPowerConnection
* PhoneAPI: onConfigStart and onConfigComplete callbacks for subclasses
* NimbleBluetooth: switch to high-throughput BLE mode during config, then lower-power BLE mode for steady-state
* Add some documentation to NimbleBluetooth.cpp
* make cppcheck happier
* Allow runOnceHandleToPhoneQueue to tell runOnce to shouldBreakAndRetryLater, so we don't busy-loop forever in runOnce
* Gating some logging behind DEBUG_NIMBLE_ON_READ_TIMING ifdef again; bump retry count
* Add check for connected state in NimBLE onRead()
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Co-authored-by: Jonathan Bennett <jbennett@incomsystems.biz>
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