List all tournaments or create a new tournament.

GET /api/v1/tournaments/?format=api&ordering=-name&page=5782
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "first_pairing_method": "slide",
            "subsequent_pairing_method": "slaughter",
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            "started": "2026-01-02T15:46:28.511954Z",
            "ended": null,
            "start_waiting": "2026-01-02T15:46:28.357465Z",
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}