implemented BSet tests and fixed some things

...primitives/src/main/rust_embedded/btypes/src/brelation.rs

btypes_primitives/src/main/rust_embedded/btypes/src/bset.rs

.../hhu/stups/codegenerator/generators/MachineGenerator.java

.../de/hhu/stups/codegenerator/generators/TypeGenerator.java

...n/resources/de/hhu/stups/codegenerator/RustTemplate_e.stg

...va/de/hhu/stups/codegenerator/rust_embedded/TestSets.java

src/test/resources/de/hhu/stups/codegenerator/Card.mch

src/test/resources/de/hhu/stups/codegenerator/Difference.mch

src/test/resources/de/hhu/stups/codegenerator/ElementOf.mch

src/test/resources/de/hhu/stups/codegenerator/EmptySet.mch

...esources/de/hhu/stups/codegenerator/EmptySetAddition.strs

src/test/resources/de/hhu/stups/codegenerator/Fin.mch

src/test/resources/de/hhu/stups/codegenerator/Fin1.mch

...es/de/hhu/stups/codegenerator/GeneralizedIntersection.mch

.../hhu/stups/codegenerator/GeneralizedIntersectionEmpty.mch

...resources/de/hhu/stups/codegenerator/GeneralizedUnion.mch

...rces/de/hhu/stups/codegenerator/GeneralizedUnionEmpty.mch

...est/resources/de/hhu/stups/codegenerator/Intersection.mch

...rces/de/hhu/stups/codegenerator/IntersectionAddition.strs

...est/resources/de/hhu/stups/codegenerator/NotElementOf.mch