feat: add isLinkLocal function #3801

Job	Run time
Build	3m 16s
Test example js-libp2p-example-browser-pubsub	1m 38s
Test example js-libp2p-example-chat	51s
Test example js-libp2p-example-circuit-relay	49s
Test example js-libp2p-example-connection-encryption	56s
Test example js-libp2p-example-custom-protocols	59s
Test example js-libp2p-example-delegated-routing	1m 53s
Test example js-libp2p-example-discovery-mechanisms	1m 20s
Test example js-libp2p-example-peer-and-content-routing	1m 3s
Test example js-libp2p-example-pnet	57s
Test example js-libp2p-example-protocol-and-stream-muxing	1m 25s
Test example js-libp2p-example-pubsub	51s
Test example js-libp2p-example-transports	52s
Test example js-libp2p-example-webrtc-private-to-private	1m 47s
	18m 37s

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