Expose `Dependencies` field in Library struct #5392

Job	Run time
run-determination	1s
check-formatting (./)	17s
check-outdated (./)	24s
check-style (./)	54s
check-config (./)	14s
check-license-headers (./)	23s
build (internal/arduino/discovery/discovery_client)	26s
build (rpc/internal/client_example)	38s
build (commands/term_example)	31s
	3m 48s

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