Add prefix with class name

…types yet.

copyWithNull

* adding the failing test and shortening the extension name

* test fix

* adding a sophisticated test case

* fixing the generic annotation parsing

* comments, cleanup, and asserts

* extending _typeParametersNames function and removing _typeParametersAnnotation

* naming

* version bump

* minor correction

* basic implementation

* switch CI to dev

* minor corrections

* test fix

* changelog

* Updating dependencies

* typo fix

* readme update

* source_gen and build versions bump

* Update run_tests.yml

* added nullability for generic parameter constraints

* added nullability check for typing nullables

* analyzer version is set to 2.0.0

* ci minor corrections

* ci corrections

* a possible build fix

* minor ci correction

* changelog

* minor

* Switching to flutter_lints + null safety code cleanup

* CI corrections

* named constructor feature

* basic implementation

* minor

* prevent unnecessary copyWithNull methods generation

* naming corrections

* naming + ignore cast_nullable_to_non_nullable

* docs + test fixes

* docs

* docs

* release

* fix for copyWith null for a non-nullable value

* version bump

* minor ci correction

* minor ci correction

* Updating analyser version

* Release notes

* Lint correction

* tests correction