Add the client-side subscriptions/listen driver #3350

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	56s
checks / test (3.11, lowest-direct, windows-latest)	2m 2s
checks / docs	40s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 24s
checks / test (3.11, locked, ubuntu-latest)	1m 25s
checks / test (3.10, locked, windows-latest)	2m 18s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 26s
checks / test (3.10, lowest-direct, windows-latest)	1m 50s
checks / test (3.10, locked, ubuntu-latest)	1m 28s
checks / test (3.12, lowest-direct, windows-latest)	2m 3s
checks / test (3.11, locked, windows-latest)	2m 37s
checks / test (3.12, locked, windows-latest)	1m 53s
checks / test (3.14, locked, windows-latest)	2m 48s
checks / test (3.14, lowest-direct, windows-latest)	2m 1s
checks / test (3.13, locked, windows-latest)	2m 11s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 29s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 23s
checks / test (3.13, lowest-direct, windows-latest)	1m 46s
checks / test (3.14, locked, ubuntu-latest)	3m 23s
checks / test (3.13, locked, ubuntu-latest)	1m 17s
checks / test (3.12, locked, ubuntu-latest)	1m 48s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 13s
all-green	2s
	39m 34s

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