@spec deco(term()) :: {:error, String.t()} | {:ok, YaBTT.Deco.t()}

Deconstruct the announce request parameters.

The params can be a map/0 or a Keyword.t/0. If it is a Keyword, it will be converted to a map first. The params must contain the info_hash and peer_id keys. Otherwise, it will return an error. The params will be stored in the YaBTT.Deco.t/0 struct.