Add Cross-Seed - Stand Alone torrent cross seed application

### App Name

Cross-Seed

### App Website / GitHub

https://github.com/cross-seed/cross-seed

### Docker Image

ghcr.io/cross-seed/cross-seed:6

### App Description

Stand alone cross seed application to help boost torrent site ratios

### Category

Downloading (Torrents / Usenet)

### Additional Context

_No response_