Update go.mod module declaration, all require lines, and .go import
paths from forge.lthn.ai to dappco.re. Dependencies updated: core
v0.5.0, log v0.1.0, io v0.2.0. Replace directives added for local
module resolution. forge.lthn.ai/core/cli and go-inference retained
at old paths (not yet migrated).
Co-Authored-By: Virgil <virgil@lethean.io>
Replace all fmt.Errorf and errors.New calls across 32 production files
with coreerr.E("caller.Method", "message", err) from go-log, matching
the convention already established in publishers/scoop.go and
publishers/homebrew.go.
Co-Authored-By: Virgil <virgil@lethean.io>