Migrate from setup.py to pyproject.toml

[joshuaswanson]

Closes #2173.

Replaces setup.py with a pyproject.toml using the setuptools build backend. All metadata, dependencies, optional dependency groups, console scripts, and package data patterns have been preserved.

Notable changes:

• cmake and scikit-build are now always listed as dependencies (the old setup.py conditionally excluded them if cmake >= 3.17 was found on the system, but this dynamic check is not possible in a static pyproject.toml)
• Version is read dynamically from dace.version.__version__
• Package data uses the same glob patterns as before
• MANIFEST.in is kept as-is for source distributions