Scikit-build

What's changed

Features:

- Provide null directory (not installed) by henryiii in 143

Fixes:

- Fix issue with 32-bit Windows in 0.1.1 by henryiii in 142

Fixes:

- Windows non-default generators by henryiii in 137
- Compute the correct default generator for CMake by henryiii in 139

Testing:

- Support make missing by henryiii in 140
- Clear `CMAKE_GENERATOR` by henryiii in 141

scikit-build-core will try to respect old defaults when new versions are
released.

First non-prerelease! Scikit-build-core is ready to be used. The remaining
limitations (like support for editable mode and build caching) will be addressed

Still preparing for release. One small addition to the error printout.

Features:

- Did you mean? for config-settings and pyproject.toml by henryiii in 135

Testing:

- Split up isolated and virtualenv fixtures by henryiii in 134

Preparing for a non-beta release.

Fixes:

- Paths on Windows by henryiii in 126
- Support pre-set generators by henryiii in 118
- Warn on scripts with invalid shebangs by henryiii in 132
- Minimum constraints now set by henryiii in 129

Refactoring:

- Rename pyproject -> build dir by henryiii in 121

Testing:

- Add msys2 to the CI by henryiii in 119
- Add test report header by henryiii in 124
- Test min constraints without Windows by henryiii in 129
- Remove pytest-virtualenv by henryiii in 125 and 131
- Mark unimportant test xfail non-strict for conda-forge by henryiii in 108