Create a shorthand for the formatted wzstring

[Monsterovich]

The equivalent of std::format from C++20.

[ManManson]

One small nitpick, otherwise LGTM.

[Monsterovich]

@KJeff01 @past-due merge?

[KJeff01]

It says there are merge conflicts yet won't say which file for some reason. So needs a rebase. Pastdue said he may need to add tweaks for potential compiler warnings last time I poked him about this.

I am also trying to reduce the chances of merging large PRs that touch many files until pastdue finishes his big project (probably art-rev switcher) to avoid more merge-conflict troubles for him.

I keep github notifications turned off. You can DM me Discord for faster contact however.

[Monsterovich]

It says there are merge conflicts yet won't say which file for some reason.

@KJeff01 Hm. I've successfully merged this branch with master, there were no conflicts.

[past-due]

Superseded by and incorporated into #4787, which also enables format attribute checking for these sorts of C++ variadic template functions.