C23 dialect support

[nickclark2016]

What does this PR do?

Adds support for the C23 and GNU23 dialects of C.

How does this PR change Premake's behavior?

No breaking changes. Purely an extension of the existing behaviors.

Anything else we should know?

With MSVC tooling, uses the clatest flag instead of C23, as the flag does not exist at time of PR. Closes #2410.

Did you check all the boxes?

• Focus on a single fix or feature; remove any unrelated formatting or code changes
• Add unit tests showing fix or feature works; all tests pass
• Mention any related issues (put closes #XXXX in comment to auto-close issue when PR is merged)
• Follow our coding conventions
• Minimize the number of commits
• Align documentation to your changes

You can now support Premake on our OpenCollective. Your contributions help us spend more time responding to requests like these!

[stu]

I was gonna say, AWESOME! but this breaks something.

I did a checkout from the C23 merge commit and build off bootstrap

git checkout 07896b90314f63724fffc2956987f84019b573ad
git reset --hard && git clean -f -d -x
bash ./Bootstrap.sh
make -j8

ok we now have a premake5, lets rebuild itself.

./bin/release/premake5 embed
./bin/release/premake5 gmake2
Error: [string "src/base/_foundation.lua"]:179: bad argument #1 to 'format' (string expected, got nil)

(every premake5.lua i run this build against yields the above _foundation error, not just premake5's own build script)

checking against the commit before this one (216807e) yields no problems.

[nickclark2016]

Looks like I messed something up in the gmake2 migration to gmake. That said, please try using the latest master and the gmake exporter (the old gmake has been renamed in preparation for removal).

[stu]

oooh old habits die hard. didnt realise gmake2 was supersceded by gmake and old gmake was gone!

using just gmake seems to work fine.

[nickclark2016]

Awesome. Hopefully when 2422 gets merged in, the automatic "you should update scripts" message should actually work.