Small Web - Unified Sources mode

[FaFre]

New mode to combines both Wander/Kagi (all) sources and explore completely randomly through both sources:

1. Randomize Mode
2. Randomize Console (Wander) or Category (Kagi)
3. Get random site

Source: https://codeberg.org/susam/wander/issues/11#issuecomment-12222369