Adds EE folder in the stylelint command

What does this MR do?

Adds EE folder in the stylelint command

This does not affect the CE output.

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation created/updated or follow-up review issue created
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content