feat: Add DHT and RequestResponse notifications #1229

Job	Run time
changes	3s
run-deny	1m 16s
run-tests-windows (stable, all)	21m 4s
run-tests-windows (stable, none)	4m 28s
run-tests-windows (nightly, all)	26m 0s
run-docs	2m 38s
run-checks (ubuntu-latest, stable)	1m 21s
run-tests-windows (nightly, none)	9m 5s
run-checks (ubuntu-latest, nightly)	1m 52s
run-checks (macos-latest, stable)	1m 44s
run-tests (ubuntu-latest, stable, all)	13m 46s
run-checks (macos-latest, nightly)	5m 6s
run-tests (ubuntu-latest, stable, none)	1m 27s
run-checks (windows-latest, stable)	6m 26s
run-tests (ubuntu-latest, nightly, all)	16m 21s
run-checks (windows-latest, nightly)	4m 47s
run-tests (ubuntu-latest, nightly, none)	3m 10s
run-tests (macos-latest, stable, all)	22m 57s
run-tests (macos-latest, stable, none)	1m 58s
run-tests (macos-latest, nightly, all)	19m 17s
run-tests (macos-latest, nightly, none)	11m 24s
	2h 56m 10s

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