Feature/markdown cmake gen info

[uilianries]

Changelog: Feature: List cpp_info.names and cpp_info.filenames in JSON and Markdown generator.
Docs: conan-io/docs#1844

Closes #7525

Now anyone can read easily what will be produced when mixing cpp_info.name + cpp_info.names + cpp_info.filenames. The current feature works good and solves the cmake targets, but is almost unreadable when you don't know the feature in details. I hope these generators can show the final result without much knowledgement about the feature.

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[memsharded]

Looking good, thanks