Integrate Biodivine/LibBDD

[nhusung]

This PR integrates the Biodivine/LibBDD library into BDD benchmark. Biodivine/LibBDD itself is written in Rust and does not come with a C FFI, hence I hacked a FFI on my own.

Some remarks:

• I tested most of the benchmarks and they seem to work.
• lib-bdd-ffi uses FetchContent in CMake and builds a library using cargo. Therefore, an internet connection is needed for the first time invoking cmake and make.
• I did not monitor memory usage yet to see if the maximum node count is set in a meaningful way. AFAIK, LibBDD also does not provide any way to set the maximum apply cache size. They use a new HashMap for every apply operation, without any bounds on the size. lib-bdd-ffi checks that the cumulated node count of all BDDs belonging to a manager does not exceed some maximum value. This check happens after each apply operation only, i.e., the library might allocate too much memory in between.
• I was a bit unsure whether to use lib_bdd, libbdd, or lib-bdd (the latter would only be applicable in executable names). In the end, I chose lib_bdd for the C++ interface to lib-bdd-ffi, but libbdd for all BDD Benchmark related things (e.g., libbdd_bdd_adapter, and executable names).

[nhusung]

One more remark: I did not yet update the README accordingly

[SSoelvsten]

Thanks! The compromises made on the computation cache and BDD size seems reasonable considering the pecularities of lib-bdd.