FEL CTU BRUTE Deadline Manager

Adds task management, plagiat tracking dashboard, and optional Classic UI style to FEL CTU BRUTE.

Fixes and adds features to the FEL CTU BRUTE. - Custom task states (Done, Todo, Highlight, Cancel) for Deadlines, synced across devices. - Automatic task completion when reaching maximum points - Party Mode celebration with disco lights and confetti when a task is completed. - Toast notifications for newly added and completed tasks. - Optional Classic BRUTE UI mode and Course Summary table reordering. - Automatically hides the "Plagiat Incident" navbar warning by default. Source code: https://github.com/ProfiPoint/brute-extension (feel free to do whatever you want with the code / do pull requests)