This breaks older clang-format version :/

This reverts commit 81f70c9639154dcd067d73b0620767d8ba0362cf.

This is only supported in the latest clang-format version.
Having formatting enabled would cause it to complain about no rules
being set for json files.

Ensure /Zc:__cplusplus is passed when using newer C++ standards.
https://docs.microsoft.com/en-us/cpp/build/reference/zc-cplusplus?view=msvc-160

Should help catch errors like initializing a q-ptr with itself[1].

[1] https://invent.kde.org/frameworks/knewstuff/-/commit/d09ba1917cb7e035a9aac6c27c86fc4df5da3194

I was seeing `error: No such remote 'origin'` in the cmake output.
This commit avoids hardcoding `origin` as the upstream URL and instead
uses the `git rev-parse @{u}` to get the configured upstream.

As a follow-up we may want to check if this should be executed by default,
but for now this fixes a warning that I'm seeing with various projects.

wl_resource_for_each_safe is used in kwayland-server, and as the name
suggests is a for-each like function.

If people ship their own clang-format file they might still have the copyright, because
they forked it. Instead search for the notice that the file is autogenerated.

Git on Windows provides bash