fix: prevent 0 value for max-concurrency and threads#2145
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Using NonZeroUsize means we get nice error messages automatically from
clap.
error: invalid value '0' for '--max-concurrency <MAX_CONCURRENCY>': number would be zero for non-zero type
For more information, try '--help'.
Unfortunately, the error is more cryptic when using a zero in the toml:
[ERROR] Error while loading config: Cannot load configuration file: lychee.toml
See: https://github.com/lycheeverse/lychee/blob/lychee-v0.23.0/lychee.example.toml
Fixes lycheeverse#2141
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Using NonZeroUsize means we get nice error messages automatically from clap.
Unfortunately, the error is more cryptic when using a zero in the toml:
Fixes #2141