Add a test of .pth handling. (#118) #345

Job	Run time
Pre-commit checks / Pre-commit Checks	11s
Unit tests (macOS-app, 3.9)	2m 17s
Unit tests (macOS-Xcode, 3.9)	3m 32s
Unit tests (macOS-Xcode, 3.10)	4m 5s
Unit tests (macOS-Xcode, 3.11)	5m 22s
Unit tests (macOS-app, 3.10)	2m 22s
Unit tests (macOS-Xcode, 3.12)	4m 24s
Unit tests (macOS-Xcode, 3.13)	3m 16s
Unit tests (linux-flatpak, 3.12)	5m 24s
Unit tests (windows-VisualStudio, 3.11)	4m 14s
Unit tests (macOS-app, 3.13)	2m 48s
Unit tests (windows-VisualStudio, 3.12)	3m 32s
Unit tests (linux-flatpak, 3.13)	5m 7s
Unit tests (macOS-app, 3.11)	2m 12s
Unit tests (windows-app, 3.9)	2m 46s
Unit tests (windows-VisualStudio, 3.10)	3m 38s
Unit tests (linux-flatpak, 3.9)	4m 56s
Unit tests (linux-flatpak, 3.10)	4m 56s
Unit tests (windows-app, 3.10)	2m 47s
Unit tests (windows-VisualStudio, 3.13)	3m 53s
Unit tests (android, 3.9)	6m 27s
Unit tests (android, 3.12)	5m 24s
Unit tests (iOS, 3.9)	10m 20s
Unit tests (linux-flatpak, 3.11)	5m 0s
Unit tests (iOS, 3.13)	5m 12s
Unit tests (windows-app, 3.13)	3m 16s
Unit tests (windows-app, 3.12)	2m 52s
Unit tests (iOS, 3.11)	7m 26s
Unit tests (windows-app, 3.11)	2m 54s
Unit tests (windows-VisualStudio, 3.9)	3m 46s
Unit tests (android, 3.10)	5m 37s
Unit tests (macOS-app, 3.12)	2m 9s
Unit tests (linux-system, system, ubuntu-latest, sudo apt update -y && sudo apt install -y --no-i...	2m 28s
Unit tests (android, 3.13)	5m 24s
Unit tests (iOS, 3.10)	9m 38s
Unit tests (iOS, 3.12)	14m 2s
Unit tests (android, 3.11)	5m 48s
	2h 49m 25s

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