spindle/engines/nixery: make $HOME a separate directory

.air/appview: exclude nix/

*/db: set sqlite options across all connections in the pool

nix: bump gomod2nix

nix/pkgs/genjwks: use granular source

nix: don't use cp --verbose

appview/repo/tags: add link to auto-generated source archive

nix/pkgs/appview-static-files: fix build on sandboxed macOS

nix: add script to do the lexgen dance

appview/db: fix comparing against []byte

appview: remove some trailing whitespace

nix/vm: add debugging tools mentioned in docs

nix: update lexgen package

appview: repo: trim leading @ from collaborator's handle