List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=max_ranking&page=4767
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "Part of an arena tournament - 2026. For details, rules and arena-standings see the group page.\n\nThe tournament will start as soon as it is full (10 players).",
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