List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=board_size&page=5598
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

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            "description": "毎月27日に開催される定例トーナメントです。これは第十九回村瀬碁グループ定例トーナメントです。2020年3月27日に開始されます。\n\nA tournament that happens every month on the 27th. This is the 19th tournament that starts on March 27th, 2020.",
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