Previously, we were using io.github.cvc5.api to mirror the C++
namespace that the API was in. The namespace of the C++ API changed to
simply cvc5 and so this commit updates the Java package accordingly.
This PR patches cross reference links in Kind.java comments for now until a proper way is implemented that handles documentation for cpp, python and Java API.
Also extends to non-trivial unit test of SynthResult.
Note this also changes the expected output when using --sygus-out=status from unsat/sat/unknown to feasible/infeasible/fail (the option is used mostly just for our regressions). The output mode status-or-def is now equivalent to standard and is hence deleted.
