feat: add Sys trait for swapping out system #209

Job	Run time
Rustfmt [Formatter]	18s
Clippy [Linter] (windows-latest)	1m 39s
Clippy [Linter] (macos-latest)	22s
Clippy [Linter] (ubuntu-latest)	21s
Compile (wasm32-wasip1)	24s
cargo-deny	22s
Compile (wasm32-unknown-unknown)	17s
Compile (x86_64-unknown-linux-musl)	22s
Test Suite (ubuntu-latest, stable)	17s
Test Suite (windows-latest, 1.70)	52s
Test Suite (ubuntu-latest, nightly)	20s
Test Suite (ubuntu-latest, 1.70)	16s
Test Suite (windows-latest, nightly)	50s
Test Suite (macos-latest, stable)	21s
Test Suite (macos-latest, nightly)	31s
Test Suite (windows-latest, stable)	42s
Test Suite (macos-latest, 1.70)	29s
	8m 43s

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