Use Pkg app for pre-commit hook?

[gdalle]

From what I understand, this would not require people to have ExplicitImports installed in their global environment.
Related:

• Update to use Pkg app fredrikekre/runic-pre-commit#5
• Modify pre-commit hook to use CLI? domluna/JuliaFormatter.jl#958
• Pkg app & pre-commit hook aviatesk/JET.jl#789