[75] fix tournament list response being empty octet stream; docs, indentation

[jakubmanczak]

Closes #75 by implementing the outlined fixes. Also aligns indentation with whatever rustfmt outputs.

[Copilot]

Pull Request Overview

This PR fixes an issue where the tournament list response was returning an empty octet stream instead of a proper JSON response. The changes also include code formatting improvements to align with rustfmt standards.

• Removed logic that returned an empty vector when no tournaments are visible, allowing proper JSON response
• Removed outdated API documentation for 401 status code
• Applied consistent code formatting and indentation throughout the file

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[Mateusz-Dobrzynski]

401 is among possible responses served by this endpoint and as such must be documented. It occurs when making a request without logging in (and possibly in some other cases that I don't remember at the moment). This description is obviously wrong (must've been copy-pasted from some other endpoint relating to a single tournament), but the solution here is to correct it, not delete altogether.

[Mateusz-Dobrzynski]

Tested the code, indeed returns an empty JSON now. Documentation, however, was wrongly modified.