Add McpMetaAttribute for attaching metadata to tools, prompts, and resources #991

Job	Run time
build (ubuntu-latest, Release)	5m 16s
build (windows-latest, Release)	7m 50s
build (ubuntu-latest, Debug)	6m 55s
build (macos-latest, Release)	6m 37s
build (windows-latest, Debug)	9m 23s
build (macos-latest, Debug)	6m 24s
publish-coverage / publish-coverage	32s
	42m 57s

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