Change the standard Input impl to support any slice

[marcdejonge]

The main change is that the Item is a reference instead of a copy.

It also adds an IntoInput type that makes it easier to deal with inputs for the tag and take functions.

Possible solution to solve #1809 and #1799

[codspeed-hq]

CodSpeed Performance Report

Merging #1810 will improve performances by 35.77%

_{Comparing marcdejonge:generic-input-implementation (765bfa8) with main (a44b52e)}

Summary

⚡ 2 improvements
✅ 22 untouched benchmarks

Benchmarks breakdown

	Benchmark	BASE	HEAD	Change
⚡	float bytes	1.9 µs	1.7 µs	+10.99%
⚡	float bytes streaming	748.6 ns	551.4 ns	+35.77%

[marcdejonge]

Probably also something for 9.0 if you even want to do this