[meta] Infrastructure improvements

[MLopez-Ibanez]

• run mypy: https://github.com/pre-commit/mirrors-mypy
• ASV benchmarks: https://asv.readthedocs.io/en/stable/index.html
• Fix codecov setup or find a better alternative
• Add R benchmarks: https://github.com/r-lib/vctrs/tree/main/bench
• GitHub Action to build the C code and DLL with the MSVC compiler: https://stackoverflow.com/questions/64557292/how-can-i-use-the-msvc-compiler-from-github-actions