CH_CFG_USE_WAITEXIT (used only is Shell run as thread)
CH_CFG_USE_EVENTS (NanoVNA not use events)
CH_CFG_USE_EVENTS_TIMEOUT (NanoVNA not use events)
Implement stack use check in "threads" command, now free stack space show in table as "stk free" in hex
Check stack usage by sweep, and main threads (seems all ok, but add 64 bytes to sweep)
Replace some const values to defined