This release adds a `casadi::external` function loader that does not depend on the CasADi C++ library. This simplifies the installation and reduces the binary size.
The `ALPAQA_WITH_CASADI` option now enables this loader by default. To enable the full CasADi loader, which also supports other types of `casadi::Function` objects (e.g. symbolic expressions or serialized functions), use `ALPAQA_WITH_EXTERNAL_CASADI` (this requires CasADi to be installed).
**Full Changelog**: https://github.com/kul-optec/alpaqa/compare/1.0.0a17...1.0.0a18