Add try_unzip

[QDoussot]

Add try_unzip

Basically a fallible version of std::iter::Iterator::unzip

• Converts an iterator of Result of pairs into a Result of pair of containers.
• Stops and return first error encountered if any (short-circuiting)

Checks

• doctest ✅
• sanity test ✅
• cargo check ✅
• cargo test ✅
• cargo clippy ✅

[carlsverre]

This looks great! Thanks for the contribution.

[QDoussot]

Nice, you're welcome :)