Update C++ Settings doc (#8310)

* merge settings doc with c_cpp_properties schema, add recursive include settings

* Acrolinx fixes

* Update docs/cpp/customize-cpp-settings-cpp.md

Co-authored-by: Copilot <[email protected]>

* PR Feedback: remove optional, make sample more generic

* shorten to only mac variable example

* format the configuration and update some descriptions

* updated wording

* Add to TOC

* update reduce wording

* Update docs/cpp/customize-cpp-settings.md

Co-authored-by: Nick Trogh <[email protected]>

* Update docs/cpp/customize-cpp-settings.md

Co-authored-by: Nick Trogh <[email protected]>

* Update docs/cpp/customize-cpp-settings.md

Co-authored-by: Nick Trogh <[email protected]>

* Update docs/cpp/customize-cpp-settings.md

Co-authored-by: Nick Trogh <[email protected]>

* Update docs/cpp/customize-cpp-settings.md

Co-authored-by: Nick Trogh <[email protected]>

* Update docs/cpp/customize-cpp-settings.md

Co-authored-by: Nick Trogh <[email protected]>

* Update docs/cpp/customize-cpp-settings.md

Co-authored-by: Nick Trogh <[email protected]>

* Update docs/cpp/customize-cpp-settings.md

Co-authored-by: Nick Trogh <[email protected]>

* Update docs/cpp/customize-cpp-settings.md

Co-authored-by: Nick Trogh <[email protected]>

* Update docs/cpp/customize-cpp-settings.md

Co-authored-by: Nick Trogh <[email protected]>

* Update docs/cpp/customize-cpp-settings.md

Co-authored-by: Nick Trogh <[email protected]>

* Wording fixes

* Add blank line

* More updates, added colons at the end of word and better backticks

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Co-authored-by: Copilot <[email protected]>
Co-authored-by: Bob Brown <[email protected]>
Co-authored-by: Nick Trogh <[email protected]>

Author: 4 people