Change the default formatter to the official one

[asd-a]

meson has supported format (fmt) subcommand, since 1.5, and 1.6.1 released recently.
So we could use the official one that do not need ex-dependency.

[tristan957]

@Totto16 did your PR cover this? I can't remember

[Totto16]

@Totto16 did your PR cover this? I can't remember

Not really, In the package.json the default value for mesonbuild.formatting.provider is still muon. I thought, that the generic code to handle formatters already handles multiple formatters correctly (use meson, if muon isn't present or vice versa) but he doesn't. But it seems fairly straightforward to do that, so I might as well do it.