Create a TUI for editing filesystem.toml files
This seems like a useful thing to have, and could possibly make it unnecessary to have every package name listed but commented out in filesystem.toml.
I'm thinking of something sort of like make menuconfig for the Linux kernel. It should have somewhere listing all packages, where you can check to add each one. And ideally support editing everything else that can be in a filesystem.toml file. See the config directory for everything that file supports.