Identify other package ecosystems of interest

[nightlark]

• docker (Create dataset mapping of official Docker image IDs #50)
• npm
• www.jsdelivr.com or cdnjs?
• maven (Create maven/java dataset #153)
• winget
• chocolatey
• homebrew
• vcpkg
• spack (Create a spack dataset #124)
• conan
• conda
• xrepo
• hunter
• cpm
• nix
• snapcraft
• flatpak
• https://mirrors.kernel.org/ - many Linux distributions

C++20 module name to package mapping

• Identify packages in apt, vcpkg, spack, source code repositories that export C++20 modules, and create a dataset mapping the exported names to the packages that provide an export with a matching name. Will require parsing source code to construct it.