[llvm] [llvm][Support] Add YAMLGenerateSchema for producing YAML schemas (PR #133284)

[Scott Linder via llvm-commits]

slinder1 wrote:

I also agree with @jh7370 that the focus should be on the RFC and getting at least a bit of consensus on the schema format. It seems like you're generating JsonSchema, but I don't see a direct mention of that. I think it would be useful to at least make a note of the new functionality in `llvm/docs/YamlIO.rst` or some other relevant doc, and include links to the documentation for the schema generated.

Back to the code again, I think some tests for the JsonSchema format being generated in some corner cases would also be nice.

https://github.com/llvm/llvm-project/pull/133284