Expose golang `fqbn` package for public use #4885

Job	Run time
run-determination	1s
check-outdated (./)	9s
check-config (./)	9s
build (internal/arduino/discovery/discovery_client)	16s
build (rpc/internal/client_example)	22s
build (commands/term_example)	28s
check-license-headers (./)	14s
check-style (./)	1m 13s
check-formatting (./)	6s
	2m 58s

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