test: add unit tests for pet-windows-registry crate (Fixes #389) #1469

Job	Run time
Tests in Containers (ci-jupyter-container, ubuntu-latest, mcr.microsoft.com/devcontainers/univers...	4m 52s
Tests in Containers (ci-homebrew-container, ubuntu-latest, homebrew/brew, x86_64-unknown-linux-musl)	4m 0s
Tests (ubuntu-latest, x86_64-unknown-linux-musl, yes)	9m 27s
Builds (ubuntu-latest, x86_64-unknown-linux-musl, yes)	2m 15s
Tests (windows-latest, x86_64-pc-windows-msvc, yes)	10m 59s
Builds (macos-latest, x86_64-apple-darwin, yes)	3m 51s
Builds (windows-latest, x86_64-pc-windows-msvc)	5m 11s
Tests (macos-latest, x86_64-apple-darwin, yes)	14m 7s
Tests (macos-14, aarch64-apple-darwin, yes)	15m 2s
Env Tests (ci-poetry-project, ubuntu-latest, x86_64-unknown-linux-musl)	3m 2s
Builds (windows-latest, aarch64-pc-windows-msvc)	5m 11s
Env Tests (ci-poetry-custom, windows-latest, x86_64-pc-windows-msvc)	6m 1s
Env Tests (ci-poetry-custom, ubuntu-latest, x86_64-unknown-linux-musl)	2m 55s
Builds (macos-14, aarch64-apple-darwin, yes)	2m 41s
Env Tests (ci-poetry-project, windows-latest, x86_64-pc-windows-msvc)	5m 59s
Env Tests (ci-poetry-global, windows-latest, x86_64-pc-windows-msvc)	5m 43s
Env Tests (ci-poetry-global, ubuntu-latest, x86_64-unknown-linux-musl)	3m 3s
	1h 44m 19s

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