[SYMFONY] Add ability to configure slugify

[estahn]

• Moved the CocurSlugifyExtension into the DependencyInjection folder to comply with Symfony's bundle standard
• Added configuration for the slugify service (e.g. enable lowercase)

[florianeckerstorfer]

I don't think that is necessary. The Slugify bundle only contains three files, how I don't think we need to move them to separate namespaces.

[estahn]

@florianeckerstorfer Alright, i will move them all into one.

[estahn]

@florianeckerstorfer Actually it would be better to follow the symfony convention. The loader doesn't pick the config atm and the extension has been initialised in a wrong way.

• https://symfony.com/doc/current/cookbook/bundles/extension.html#manually-registering-an-extension-class
• https://github.com/symfony/http-kernel/blob/master/Bundle/Bundle.php#L207

I will adjust that now manually, but in future it would be better to stick to conventions.

[estahn]

@florianeckerstorfer Seems all good now. Do you need me to squash commits or is all good?

[florianeckerstorfer]

Since these are a lot of commits, yes, please squash.

[estahn]

@florianeckerstorfer done.

[florianeckerstorfer]

Thanks a lot.