Expose the specific engine client

[simoneNEMO]

Quick solution to #3

A couple of thoughts:

• It is a bit suboptimal that the client getter return any type. Ideally with a bit of Typescript voodoo one could make so that MagnifyManager.engine returns the type of the specific engine instead of the abstract MagnifyEngine and this should solve the problem with the getter type as well (also the client getter does not need to be part of the abstract MagnifyEngine)
• The magnify service was not exported. Should we also change the filename from magnify.ts to main.ts as in most of other AdonisJS packages

[kerwanp]

Thanks a lot for the contribution!

It is a bit suboptimal that the client getter return any type. Ideally with a bit of Typescript voodoo one could make so that MagnifyManager.engine returns the type of the specific engine

I think you are right, this package deserve to be well typed. If you want to do it in this pull request, feel free to do it! If not I'm ok to merge as it is and I will work on it later.
Also, I think we could use https://japa.dev/docs/plugins/expect-type in the tests to ensure types are working correctly.

The magnify service was not exported. Should we also change the filename from magnify.ts to main.ts as in most of other AdonisJS packages

Definitely!

Thanks a lot for the typos aswell.

[simoneNEMO]

Switched to a Map for the engines cache (which was actually never used before) and improved the MagnifyManager.engine return typing. Also tests have been updated accordingly.

[kerwanp]

All tests passed !

(I should really find a way to have the tests run properly in the CI)