List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=max_ranking&page=430
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "name": "Yet another 9x9 just to flood the system (^^;; I'm kidding)",
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        {
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            "name": "Турнир Чата игроков в Го 28.03.23 Fact corresp. B",
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        {
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            "id": 21440,
            "name": "4 Players Malkovich Round Robin 10k-6k",
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                "username": "Wulfenia.",
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