feat: JSONRPCDispatcher #1887

Job	Run time
checks / pre-commit	34s
checks / readme-snippets	16s
checks / test (3.10, locked, windows-latest)	2m 11s
checks / test (3.11, lowest-direct, windows-latest)	3m 25s
checks / test (3.10, lowest-direct, windows-latest)	2m 53s
checks / test (3.11, lowest-direct, ubuntu-latest)	57s
checks / test (3.10, locked, ubuntu-latest)	54s
checks / test (3.13, locked, ubuntu-latest)	46s
checks / test (3.12, lowest-direct, windows-latest)	3m 42s
checks / test (3.11, locked, ubuntu-latest)	51s
checks / test (3.12, locked, ubuntu-latest)	58s
checks / test (3.10, lowest-direct, ubuntu-latest)	53s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 5s
checks / test (3.12, locked, windows-latest)	3m 24s
checks / test (3.13, locked, windows-latest)	2m 21s
checks / test (3.13, lowest-direct, ubuntu-latest)	54s
checks / test (3.13, lowest-direct, windows-latest)	2m 53s
checks / test (3.11, locked, windows-latest)	2m 25s
checks / test (3.14, lowest-direct, windows-latest)	2m 12s
checks / test (3.14, locked, windows-latest)	3m 57s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 23s
checks / test (3.14, locked, ubuntu-latest)	2m 26s
all-green	3s
	41m 23s

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