[11.x] Adds Enums folder to make:enum command

[milwad-dev]

#50394

In our previous PR, we didn't include the option to create enums in the Enums folder or App folder. However, we have now added this feature! If someone would like to create an enum file in the Enums folder, they just need to create a folder named Enums :)
Like models

[milwad-dev]

@driesvints
I think we need to re-run the tests.
Also, I can't access to the Styleci!!

[driesvints]

@milwad-dev seems tests still fail

[martinbean]

@milwad-dev Would be nice if this were configurable. I use Enumerations as my directory/namespace name, for example.

[milwad-dev]

"We cannot do that because if we do it for one command, we will have to do it for all commands such as models

[taylorotwell]

Added Enumerations support @martinbean

[dvlpr91]

I was expecting this command to default to the 'Enums' folder, regardless of whether it exists or not... Sad.