List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=board_size&page=3863
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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                "id": 24,
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            "subsequent_pairing_method": "strength",
            "min_ranking": 5,
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            "analysis_enabled": true,
            "exclusivity": "open",
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            "ended": "2025-09-18T15:00:01.862180Z",
            "start_waiting": "2025-01-10T22:00:38.322833Z",
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            "player_count": 73,
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}