build: upgrade to C++23

Meson 1.1.1 and GCC-13 both support C++23 and a sufficient portion of
the standard has been implemented.  Upgrade the build to leverage it.

Change-Id: Ibb8913a93032d388399b65904013e284780dad70
Signed-off-by: Patrick Williams <patrick@stwcx.xyz>
7 files changed