feat: add Sys trait for swapping out system #185

Job	Run time
Clippy [Linter] (ubuntu-latest)	11s
Compile (x86_64-unknown-linux-musl)	8s
Rustfmt [Formatter]	15s
Clippy [Linter] (windows-latest)	32s
cargo-deny	16s
Compile (wasm32-wasi)	11s
Clippy [Linter] (macos-latest)	17s
Compile (wasm32-unknown-unknown)	14s
Test Suite (ubuntu-latest, 1.70)	16s
Test Suite (ubuntu-latest, stable)	7s
Test Suite (ubuntu-latest, nightly)	20s
Test Suite (windows-latest, 1.70)	40s
Test Suite (windows-latest, stable)	2m 7s
Test Suite (windows-latest, nightly)	43s
Test Suite (macos-latest, 1.70)	26s
Test Suite (macos-latest, stable)	18s
Test Suite (macos-latest, nightly)	31s
	7m 32s

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