Add missing __init__.py to subsolvers package (#21)

Without this file, hatchling's only-packages=true setting excludes the
subsolvers directory from built wheels and sdists, causing ImportError
when installing from PyPI or conda-forge.

Prepare for tranquilo 0.1.0 (#19)

Set default sample size for linear models in noise-free and serial ca…

…se to 2 * n + 2 (#14)

Remove direct estimagic dependencies to avoid circular imports (#6)

Improve parallelization efficiency (#4)

Update keywords in setup.cfg (#3)

Remove estimagic related files (#2)