feat: add Dispatcher Protocol and DirectDispatcher #1876

Job	Run time
checks / pre-commit	31s
checks / readme-snippets	11s
checks / test (3.12, locked, ubuntu-latest)	57s
checks / test (3.11, lowest-direct, windows-latest)	3m 22s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 1s
checks / test (3.13, lowest-direct, ubuntu-latest)	53s
checks / test (3.11, locked, ubuntu-latest)	52s
checks / test (3.12, lowest-direct, windows-latest)	3m 54s
checks / test (3.10, lowest-direct, windows-latest)	2m 43s
checks / test (3.11, locked, windows-latest)	2m 40s
checks / test (3.12, locked, windows-latest)	3m 25s
checks / test (3.13, locked, windows-latest)	2m 44s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 0s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 25s
checks / test (3.13, lowest-direct, windows-latest)	2m 41s
checks / test (3.14, locked, windows-latest)	3m 35s
checks / test (3.14, locked, ubuntu-latest)	2m 28s
checks / test (3.13, locked, ubuntu-latest)	48s
checks / test (3.14, lowest-direct, windows-latest)	2m 27s
checks / test (3.10, locked, windows-latest)	2m 18s
checks / test (3.11, lowest-direct, ubuntu-latest)	59s
checks / test (3.10, locked, ubuntu-latest)	55s
all-green	4s
	41m 53s

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