Make `enabled()` require a parameter by default.

[thyseus]

Please consider to not allow the

    FilamentDeveloperLoginsPlugin::make()
        ->enabled()

function to be used without any arguments.

I just accidentally pushed this to production for a few seconds.
YES. Its my fault, i should have read the documentation more carefully.
Anyway - its easy to avoid this mistake by making a parameter required.

If i really want it, i type:

->enabled(true)

then i actively need to think about what i am doing.

[dododedodonl]

Would accept a PR that does this. Keep in mind, this would be a breaking change, so maybe an implementation that uses func_num_args() and deprecation warnings for this version?

[thyseus]

#53

alternatively i thought about = false so the buttons would simply "disappear" instead of throwing an exception on existing installations ?