Expose golang `fqbn` package for public use #4884

Job	Run time
run-determination	1s
check-formatting (./)	14s
check-style (./)	45s
check-outdated (./)	15s
build (internal/arduino/discovery/discovery_client)	14s
build (rpc/internal/client_example)	21s
check-license-headers (./)	12s
build (commands/term_example)	25s
check-config (./)	9s
	2m 36s

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