Research vcpkg manifest mode

Using the newer manifest mode for vcpkg to fetch sqlite3 could improve developer UX on Windows, especially because it seems to be more cleanly integrated into VS2022.

https://learn.microsoft.com/en-us/vcpkg/concepts/manifest-mode
https://superuser.com/questions/1829880/vcpkg-could-not-locate-a-manifest-vcpkg-json