Bumped the Rust edition to 2024, removed all benchmark code as well as associated files and dependencies.

Refactoring of unrelated fields in the Calendar into the Simulator, documentation, some performance improvements, and renaming of some structures to bring them closer to ODEM-rs.

Improved the benchmarking logic: best version of SLX is not automatically detected before benchmarking and benchmark works even if SLX doesn't exist or ODEMx couldn't successfully be compiled.

Implemented the Ferry and Dining Philosopher examples as well as benchmarks. Added Select and Control expressions to the library.