List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=players_start&page=4542
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "subsequent_pairing_method": "slaughter",
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            "max_ranking": 25,
            "analysis_enabled": true,
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            "started": "2025-12-06T22:46:27.531282Z",
            "ended": "2026-01-19T23:25:47.052441Z",
            "start_waiting": "2025-12-06T22:46:27.273677Z",
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    ]
}