fix Windows-specific path normalization using GetLongPathNameW #1177

Job	Run time
Builds (macos-14, aarch64-apple-darwin, yes)	1m 56s
Builds (windows-latest, aarch64-pc-windows-msvc)	4m 35s
Tests in Containers (ci-jupyter-container, ubuntu-latest, mcr.microsoft.com/devcontainers/univers...	4m 21s
Builds (macos-latest, x86_64-apple-darwin, yes)	2m 48s
Env Tests (ci-poetry-global, ubuntu-latest, x86_64-unknown-linux-musl)	2m 33s
Tests in Containers (ci-homebrew-container, ubuntu-latest, homebrew/brew, x86_64-unknown-linux-musl)	3m 34s
Tests (ubuntu-latest, x86_64-unknown-linux-musl, yes)	9m 7s
Builds (ubuntu-latest, x86_64-unknown-linux-musl, yes)	1m 53s
Builds (windows-latest, x86_64-pc-windows-msvc)	3m 47s
Tests (windows-latest, x86_64-pc-windows-msvc, yes)	11m 17s
Tests (macos-latest, x86_64-apple-darwin, yes)	13m 9s
Env Tests (ci-poetry-global, windows-latest, x86_64-pc-windows-msvc)	5m 50s
Env Tests (ci-poetry-project, ubuntu-latest, x86_64-unknown-linux-musl)	2m 26s
Env Tests (ci-poetry-custom, ubuntu-latest, x86_64-unknown-linux-musl)	2m 47s
Tests (macos-14, aarch64-apple-darwin, yes)	12m 1s
Env Tests (ci-poetry-project, windows-latest, x86_64-pc-windows-msvc)	7m 6s
Env Tests (ci-poetry-custom, windows-latest, x86_64-pc-windows-msvc)	7m 36s
	1h 36m 46s

Provide feedback