docs: add TSDoc comments interface-internal module #4049

Job	Run time
Build	2m 45s
Test example js-libp2p-example-browser-pubsub	1m 37s
Test example js-libp2p-example-chat	1m 26s
Test example js-libp2p-example-circuit-relay	1m 29s
Test example js-libp2p-example-connection-encryption	1m 25s
Test example js-libp2p-example-custom-protocols	1m 22s
Test example js-libp2p-example-delegated-routing	2m 5s
Test example js-libp2p-example-discovery-mechanisms	1m 12s
Test example js-libp2p-example-peer-and-content-routing	1m 29s
Test example js-libp2p-example-pnet	2m 26s
Test example js-libp2p-example-protocol-and-stream-muxing	1m 6s
Test example js-libp2p-example-pubsub	1m 32s
Test example js-libp2p-example-transports	1m 6s
Test example js-libp2p-example-webrtc-private-to-private	1m 53s
	22m 53s

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