List all tournaments or create a new tournament.

GET /api/v1/tournaments?format=api&ordering=-board_size&page=123
HTTP 200 OK
Allow: GET, POST, HEAD, OPTIONS
Content-Type: application/json
Vary: Accept

{
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            "description": "Join this tournament and play selected games for a long time!\nIt's for everone but not provisional players so if you're provisional please go play a ranked game to reveal your rank to join and don't get upset if you lose because there is another game waiting for you!\nStarting on January 25th 2025!",
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