Avoid raising plain exception

[EpicWink]

Raise a new CattrsError instead of built-in Exception, and make all other exceptions inherit from this.

This makes it more reliable to catch validation issues due to invalid literal or date-time values when structuring (instead of having to parse the exception message when catching Exception).

[codspeed-hq]

Merging this PR will not alter performance

✅ 54 untouched benchmarks

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_{Comparing EpicWink:literal-exception (7433724) with main (304e370)¹}

Footnotes

1. No successful run was found on main (21b1954) during the generation of this report, so 304e370 was used instead as the comparison base. There might be some changes unrelated to this pull request in this report. ↩

[Tinche]

I'm good with this; I was somewhat lazy in the past about it. Backwards compatibility should be fine, right?

[EpicWink]

Backwards compatibility should be fine, right?

@Tinche yes. Only possible breakages would be from some inane strict equality checks on Exception

[Tinche]

Thanks!