List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-name&page=3637
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "started": "2025-07-01T17:00:30.413233Z",
            "ended": null,
            "start_waiting": "2025-07-01T17:00:29.835025Z",
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}