Adopt the standard tooling from sneak/prompts: the Makefile and script/
entrypoints, lint and test stages in one Dockerfile, the canonical lint
config, the CI workflow and the formatter settings. make fmt also formats
Go, using a pinned Go that script/bootstrap installs. Change the module
path to sneak.berlin/go/dcf.
Fix the lint findings in pkg/dcf in place. DCFStore becomes Store and
DCFObject becomes Object. Three behaviours change. An error listing mount
points is now returned, where a typo used to drop it. Store.String() prints
Store{ instead of DCFStore{. It prints a negative total as 0 B instead of a
huge size.
Replace the placeholder test with real tests. Move the README into the
required sections. make build now compiles the library; it pointed at a
command that does not exist.
Model: opus-5-5