Add forge.lthn.ai/core/cli to go.mod with replace directive pointing
to the local workspace path. Also adds transitive replace directives
for core/go and core/go-crypt which are dependencies of core/cli.
Co-Authored-By: Charon <charon@lethean.io>
Add consensus/ package with doc.go and sentinel error types for all
validation failures. Add MaxTransactionBlobSize constant to config.
Co-Authored-By: Charon <charon@lethean.io>
