Add lotsude template and use it per default

[fscholdei]

Features:

• Single responsive page
• Nested accordions for mucken and mucken infos
• Category and participant filter
• Highlighting of duplicate entries
• Dark mode (depending on os settings)

Closes #4, closes #1

[Bibo-Joshi]

Awesome, thanks a bunch! I have a few minor comments for further improvements, but I'll add the status as is to the productive Environment for now :)