[vcpkg docs] Remove docs migrated to https://learn.microsoft.com/vcpkg …

…and Microsoft/vcpkg-docs (microsoft#28350)

* [docs] Remove embedded documentation in favor of learn.microsoft.com

* [docs] Remove validation workflow

README.md

@@ -17,7 +17,7 @@ you can run `vcpkg help`, or `vcpkg help [command]` for command-specific help.
 * GitHub: ports at [https://github.com/microsoft/vcpkg](https://github.com/microsoft/vcpkg), program at [https://github.com/microsoft/vcpkg-tool](https://github.com/microsoft/vcpkg-tool)
 * Slack: [https://cppalliance.org/slack/](https://cppalliance.org/slack/), the #vcpkg channel
 * Discord: [\#include \<C++\>](https://www.includecpp.org), the #🌏vcpkg channel
-* Docs: [Documentation](docs/README.md)
+* Docs: [Documentation](https://learn.microsoft.com/vcpkg)
 
 # Table of Contents
 
@@ -55,11 +55,6 @@ and potentially add the port to vcpkg.
 After you've gotten vcpkg installed and working,
 you may wish to add [tab completion](#tab-completionauto-completion) to your shell.
 
-Finally, if you're interested in the future of vcpkg,
-check out the [manifest][getting-started:manifest-spec] guide!
-This is an experimental feature and will likely have bugs,
-so try it out and [open all the issues][contributing:submit-issue]!
-
 ## Quick Start: Windows
 
 Prerequisites:
@@ -128,9 +123,6 @@ With CMake, you will still need to `find_package` and the like to use the librar
 Check out the [CMake section](#using-vcpkg-with-cmake) for more information,
 including on using CMake with an IDE.
 
-For any other tools, including Visual Studio Code,
-check out the [integration guide][getting-started:integration].
-
 ## Quick Start: Unix
 
 Prerequisites for Linux:
@@ -172,8 +164,6 @@ Check out the [CMake section](#using-vcpkg-with-cmake)
 for more information on how best to use vcpkg with CMake,
 and CMake Tools for VSCode.
 
-For any other tools, check out the [integration guide][getting-started:integration].
-
 ## Installing Linux Developer Tools
 
 Across the different distros of Linux, there are different packages you'll
@@ -262,16 +252,14 @@ This will still allow people to not use vcpkg,
 by passing the `CMAKE_TOOLCHAIN_FILE` directly,
 but it will make the configure-build step slightly easier.
 
-[getting-started:using-a-package]: docs/examples/installing-and-using-packages.md
-[getting-started:integration]: docs/users/buildsystems/integration.md
+[getting-started:using-a-package]: https://learn.microsoft.com/vcpkg/examples/installing-and-using-packages.md
 [getting-started:git]: https://git-scm.com/downloads
 [getting-started:cmake-tools]: https://marketplace.visualstudio.com/items?itemName=ms-vscode.cmake-tools
 [getting-started:linux-gcc]: #installing-linux-developer-tools
 [getting-started:macos-dev-tools]: #installing-macos-developer-tools
 [getting-started:macos-brew]: #installing-gcc-on-macos
 [getting-started:macos-gcc]: #installing-gcc-on-macos
 [getting-started:visual-studio]: https://visualstudio.microsoft.com/
-[getting-started:manifest-spec]: docs/specifications/manifests.md
 
 # Tab-Completion/Auto-Completion
 
@@ -293,10 +281,10 @@ depending on the shell you use, then restart your console.
 
 # Examples
 
-See the [documentation](docs/README.md) for specific walkthroughs,
-including [installing and using a package](docs/examples/installing-and-using-packages.md),
-[adding a new package from a zipfile](docs/examples/packaging-zipfiles.md),
-and [adding a new package from a GitHub repo](docs/examples/packaging-github-repos.md).
+See the [documentation](https://learn.microsoft.com/vcpkg) for specific walkthroughs,
+including [installing and using a package](https://learn.microsoft.com/vcpkg/examples/installing-and-using-packages.md),
+[adding a new package from a zipfile](https://learn.microsoft.com/vcpkg/examples/packaging-zipfiles.md),
+and [adding a new package from a GitHub repo](https://learn.microsoft.com/vcpkg/examples/packaging-github-repos.md).
 
 Our docs are now also available online at our website https://vcpkg.io/. We really appreciate any and all feedback! You can submit an issue in https://github.com/vcpkg/vcpkg.github.io/issues.
 
@@ -335,7 +323,7 @@ by the original developers of those libraries, and download source code and buil
 official distribution locations. For use behind a firewall, the specific access needed will depend
 on which ports are being installed. If you must install in in an "air gapped" environment, consider
 installing once in a non-"air gapped" environment, populating an
-[asset cache](docs/users/assetcaching.md) shared with the otherwise "air gapped" environment.
+[asset cache](https://learn.microsoft.com/vcpkg/users/assetcaching.md) shared with the otherwise "air gapped" environment.
 
 # Telemetry
 
@@ -346,4 +334,4 @@ You can opt-out of telemetry by
 - passing --disable-metrics to vcpkg on the command line
 - setting the VCPKG_DISABLE_METRICS environment variable
 
-Read more about vcpkg telemetry at docs/about/privacy.md
+[Read more about vcpkg telemetry](https://learn.microsoft.com/vcpkg/about/privacy.html)