refactor: Lightweight watcher #358

Job	Run time
Cross Build Only (x86_64-unknown-freebsd)	49s
Cross Test (i686-unknown-linux-gnu)	1m 26s
Android Build Only (aarch64-linux-android)	1m 8s
check_semver	1m 38s
Android Build Only (armv7-linux-androideabi)	1m 9s
clippy_check	1m 45s
cargo deny	27s
Checking fmt	21s
Minimal Supported Rust Version	1m 26s
Checking docs	59s
codespell	7s
CI Test Suite / Tests (macOS-arm-latest, stable, all)	33s
CI Test Suite / Tests (ubuntu-latest, stable, all)	1m 17s
CI Test Suite / Tests (ubuntu-latest, stable, default)	57s
CI Test Suite / Tests (macOS-arm-latest, stable, default)	1m 32s
CI Test Suite / Tests (ubuntu-latest, stable, none)	1m 5s
CI Test Suite / Tests (macOS-arm-latest, stable, none)	1m 36s
CI Test Suite / Tests (windows-latest, stable, none, x86_64-pc-windows-msvc)	1s
CI Test Suite / Tests (windows-latest, stable, all, x86_64-pc-windows-msvc)	1m 57s
CI Test Suite / Tests (windows-latest, stable, default, x86_64-pc-windows-msvc)	1s
	20m 14s

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