v3.15.0b3
[3.15] gh-149786: Fixes venvlauncher builds on Windows free-threaded (GH-149847)
bpo-34977: Add Windows App Store package (GH-11027)
gh-120417: Remove unused imports in Tools (#120623)
[3.15] gh-138489: Add build-details.json generation to PC/layout (GH-149153)