* introducing MappingMutator
* extending mapping mutators
* adding example fuzzer
* making crossover mutators more flexible.
* moving example fuzzer
* fixing dependency paths
* formatting
* fixing no std error
* fixing broken docs link
* fixing import paths
* fixing imports
* more format fixing
* adding new example fuzzer to CI
* fixing further imports
* fixing formatting
* formatting fixes
* improving docs for the example fuzzer
* adding documentation and tests to mapping mutators
* make extraction function for mapped crossover mutators more general
* adding MutVecFunctionMappingMutator
* Introducing WrapsReference
* code cleanup for mapping mutators
* adding tests and docs to mapping mutators
* reformatting comments
* fixing merging of mutators in example fuzzer
* formatting
* formatting v2
* cleanup according to PR comments
* adding type constraint to MappedInput helper functions to remove the need to specify types
* matching functions passed to mapped_havoc_mutations
* removing unnecessary constraints
* mapping mutators now contain the name of their inner mutator
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Co-authored-by: Dominik Maier <domenukk@gmail.com>
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