[Mlir-commits] [mlir] [mlir][docs] Add docs on canonicalizers being folders or patterns (PR #129517)

[Andrzej Warzyński]

https://github.com/banach-space approved this pull request.

The updated format makes more sense to me, thanks! 

LGTM, but lets wait for @jpienaar or @River707 to comment on the content itself :) They have much more experience with this than me.

https://github.com/llvm/llvm-project/pull/129517