refactor (bindings/zig): Improvements (#5247) #1993

Job	Run time
build_all_features	5m 3s
build_default_features (ubuntu-latest)	43s
build_all_platforms (ubuntu-latest)	2m 54s
build_default_features (macos-latest)	37s
build_default_features (windows-latest)	2m 49s
build_all_platforms (macos-latest)	4m 23s
build_under_wasm	50s
check_clippy	4m 13s
build_all_platforms (windows-latest)	6m 13s
check_docs	3m 34s
unit	6m 57s
check_msrv	32s
	38m 48s

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