docs: align docs IA with MCP specification structure #2623

Job	Run time
build (ubuntu-latest, Release)	13m 10s
build (windows-latest, Release)	15m 5s
build (windows-latest, Debug)	12m 3s
build (ubuntu-latest, Debug)	7m 2s
build (macos-latest, Debug)	4m 45s
build (macos-latest, Release)	6m 2s
publish-coverage	0s
	58m 7s

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