feat(lints): add `unused_workspace_exclude` lint #18607

Job	Run time
Clippy Linux x86_64	1m 53s
test_gitoxide	1m 55s
lint-docs	1m 53s
rustfmt	10s
check-version-bump	1m 53s
stale-label	10s
Clippy macOS aarch64	1m 55s
lockfile	8s
msrv	1m 54s
schema	26s
Tests Linux aarch64 nightly	1m 50s
build_std	1m 53s
Clippy Windows x86_64 MSVC	1m 52s
Spell Check with Typos	8s
resolver	1m 53s
Timing HTML report	1m 54s
docs	1m 53s
Tests Windows aarch64 MSVC nightly	1m 47s
Tests Windows x86_64 MSVC nightly	1m 46s
Tests Windows x86_64 gnu nightly	1m 52s
Tests Windows aarch64 MSVC stable	1m 53s
Tests Linux x86_64 beta	1m 54s
Tests Windows x86_64 MSVC stable	1m 52s
Tests Linux aarch64 stable	1m 51s
Tests macOS aarch64 stable	1m 55s
Tests macOS aarch64 nightly	1m 56s
Tests Linux x86_64 nightly	1m 53s
Tests Linux x86_64 stable	1m 53s
conclusion	1s
	44m 13s

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