Update Go module path from forge.lthn.ai/core/go-forge to
dappco.re/go/core/forge. Migrate all import paths and dependency
references (go-io → dappco.re/go/core/io, go-log → dappco.re/go/core/log).
Update documentation (CLAUDE.md, README.md, docs/) to reflect new paths.
Co-Authored-By: Virgil <virgil@lethean.io>