win11: Add Windows 11

Based on win10 with the following changes:

• Change id from http://microsoft.com/win/10 to http://microsoft.com/win/11
• Change short-id from win10 to win11
• Change name from "Microsoft Windows 10" to "Microsoft Windows 11"
• Change derives-from and upgrades from http://microsoft.com/win/8.1 to http://microsoft.com/win/10
• Change release-date to 2021-10-04 and eol-date to 2024-10-08 for Enterprise, Education, and IoT Enterprise:
  https://docs.microsoft.com/lifecycle/products/windows-11-enterprise-and-education-version-21h2
  https://docs.microsoft.com/lifecycle/products/windows-11-iot-enterprise-version-21h2
  Note that Home and Pro have eol-date 2023-10-10:
  https://docs.microsoft.com/lifecycle/products/windows-11-home-and-pro-version-21h2
• Remove LTSB variants and media, which are not available for Windows 11 yet.
• Remove i686 architecture, since supported CPUs are either x86_64 or arm64: https://aka.ms/CPUlist
• Updated minimum resources for x86_64:
  • n-cpus from 1 to 2
  • ram from 2147483648 to 4294967296
  • storage from 21474836480 to 68719476736 https://support.microsoft.com/topic/86c11283-ea52-4782-9efd-7674389a7ba3

Note that I did not change the volume-id, which appears to be the same in Windows 11 as Windows 10. I have confirmed the following:

• Volume id CCCOMA_X64FRE_EN-US_DV9 for Windows 11 English from https://www.microsoft.com/en-us/software-download/windows11
• Volume id CENA_X64FREE_EN for Windows 11 Enterprise English from https://www.microsoft.com/en-us/evalcenter/evaluate-windows-11-enterprise
  This is not currently matched due to #88.

Thanks for considering,
Kevin