Update "C++ standard library header files" topic

[Rageking8]

I didn't add the new headers to the msvc-140 table, since it's very different from the top one, and I don't think there is much value in maintaining a custom table for an old version like VS2015. I have thoughts on removing the msvc-140 table and cleaning up the moniker range thing we currently have. What do you think @TylerMSFT?

Edit: I now see that the 2015 version is added in 7497b10 by Colin Robertson. Not sure why though.

• Change inverted "Adaptor containers" to the correct "Container adaptors"
• Update superscript entries:
  • C++20 is no longer a draft
  • Add C++23 and draft C++26
• Handle the old <contract> header that was pulled from C++20
• Add new "Diagnostics" category for <debugging> and <stacktrace>
• Add a bunch of new headers:
  • <source_location>
  • <stdfloat>
  • <debugging>
  • <stacktrace>
  • <expected>
  • <flat_map>
  • <flat_set>
  • <hive>
  • <inplace_vector>
  • <mdspan>
  • <generator>
  • <format>
  • <text_encoding>
  • <linalg>
  • <numbers>
  • <simd>
  • <print>
  • <spanstream>
  • <barrier>
  • <hazard_pointer>
  • <latch>
  • <rcu>
  • <semaphore>
  • <stop_token>

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Learn Build status updates of commit 7c5ae57:

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[v-regandowner]

@TylerMSFT - Can you review the proposed changes?

IMPORTANT: When the changes are ready for publication, adding a #sign-off comment is the best way to signal that the PR is ready for the review team to merge.

#label:"aq-pr-triaged"
@MicrosoftDocs/public-repo-pr-review-team

[TylerMSFT]

Where did you find the info for these headers?
I don't see them the product yet.

[Rageking8]

Where did you find the info for these headers? I don't see them the product yet.

Most of the information is gathered from https://en.cppreference.com/w/cpp/headers.html. A large chunk of the new headers added in this PR has not been implemented in the product, or the documentation is not yet created. Over time, when the reference material is added, we will come back to this topic and add in the links.