implement pluggable types (#73)

.github/workflows/main.yml

COPYRIGHT.txt

Makefile

README.md

cmd/cli/app/get.go

cmd/cli/app/log_info.go

cmd/cli/app/log_proof.go

cmd/cli/app/pflags.go

cmd/cli/app/pflags_test.go

cmd/cli/app/root.go

cmd/cli/app/root_test.go

cmd/cli/app/upload.go

cmd/cli/app/verify.go

cmd/server/app/serve.go

go.mod

go.sum

openapi.yaml

pkg/api/api.go

pkg/api/entries.go

pkg/api/error.go