Split protocol types into a standalone `mcp-types` package #3001

Job	Run time
checks / readme-snippets	11s
checks / pre-commit	40s
checks / test (3.10, locked, ubuntu-latest)	1m 5s
checks / test (3.12, locked, ubuntu-latest)	1m 9s
checks / test (3.13, lowest-direct, windows-latest)	1m 59s
checks / test (3.11, lowest-direct, windows-latest)	2m 6s
checks / test (3.11, locked, ubuntu-latest)	44s
checks / test (3.12, lowest-direct, windows-latest)	1m 43s
checks / test (3.13, locked, ubuntu-latest)	57s
checks / test (3.12, locked, windows-latest)	1m 37s
checks / test (3.11, lowest-direct, ubuntu-latest)	1m 6s
checks / test (3.14, locked, ubuntu-latest)	2m 2s
checks / test (3.13, locked, windows-latest)	1m 27s
checks / test (3.12, lowest-direct, ubuntu-latest)	1m 11s
checks / test (3.14, lowest-direct, windows-latest)	2m 37s
checks / test (3.13, lowest-direct, ubuntu-latest)	1m 6s
checks / test (3.11, locked, windows-latest)	1m 32s
checks / test (3.14, lowest-direct, ubuntu-latest)	1m 0s
checks / test (3.10, lowest-direct, windows-latest)	1m 20s
checks / test (3.10, lowest-direct, ubuntu-latest)	1m 2s
checks / test (3.14, locked, windows-latest)	2m 13s
checks / test (3.10, locked, windows-latest)	1m 37s
all-green	3s
	30m 27s

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