Make option `--extended` default

Since all actual Curry systems compiles programs with option --extended, this should be the default as many Curry programs use these extensions. This has also the advantage that the Curry Language Server does not report errors on such programs.

Thus, the options FunctionalPatterns and AnonFreeVars should be always set and new options NoFunctionalPatterns and NoAnonFreeVars should be added to enable the old behavior. For compatibility reasons, the option --extended should still be allowed.