Fix unsorted Swiss tournaments order on homepage

[meedoomostafa]

The Problem: On the /swiss homepage, tournaments were displayed in a disjointed chronological order (e.g., a tournament starting in "26 minutes" followed by one starting in "2 hours", then back to "6 minutes"). This happened because SwissFeature.scala merged two lists (team tournaments and cached public tournaments) using concatenation (:::) and distinctBy, but failed to re-sort the final combined list.

The Solution: I updated SwissFeature.get to explicitly sort the combined lists using the existing startsAtOrdering:

Created tournaments: Sorted by startsAt (ascending) so the soonest tournaments appear first.

Started tournaments: Sorted by startsAt (descending/reverse) so the most recently started ones appear first.

Changes:

Modified modules/swiss/src/main/SwissFeature.scala to apply .sorted after merging the lists.

Verification:

Verified that the upcoming tournaments list on /swiss is now strictly chronological.

Fixed #18817

[ornicar]

The swiss tournaments are sorted by number of players

https://github.com/lichess-org/lila/blob/sorting-swiss-tournamnet-list/modules/swiss/src/main/SwissFeature.scala#L82-L82

distinctBy preserves the order of the list.

[meedoomostafa]

The swiss tournaments are sorted by number of players

https://github.com/lichess-org/lila/blob/sorting-swiss-tournamnet-list/modules/swiss/src/main/SwissFeature.scala#L82-L82

distinctBy preserves the order of the list.

You're right about distinctBy.

However, I think it's confusing for players that they cannot choose their preferred sort type.
For now, I suggest sorting upcoming tournaments differently while keeping running tournaments sorted by the number of players.

My basic suggestion:
Add a UI filter that allows players to choose the sorting method they prefer.