Merge to one package

[skillLan]

No description provided.

[Ali1Ammar]

I see you are changing the downloader and merge it into the BinaryEngine class
but i also change it and add a BinaryEngineManger to mange the downloading, caching, versioning and copying the engine
all the conflicts is about change from BinaryEngineDownloader into BinaryEngineManger

so if you could take a look at this code prisma_cli/lib/src/engine_downloader/binary_engine_manger.dart and merge the missing part it into the BinaryEngine will just fine and you could ignore the conflicts