Optimal-congress

Fixed
- list requests as explicit dependency

Fixed
- turn off color if rich dependency is present, and enforce its presence

Added
- command 'next' to list upcoming events, filtered by minimum rating

Fixed
- better vertical alignment of presented optimization results

Added
- with optimization result, also show room name
Changed
- at fetching, list new/removed based on event's UUID (disregarding changed properties)

Fixed
- make f-string syntax work also with python versions 3.10 and 3.11 (1)