Replace fmt/strings/path/filepath/encoding/json with core equivalents throughout
all packages. Rename cfg→configuration, srv→server/subprocess, ftName→fileTypeName,
ctxSize→contextSize. Add usage-example doc-comments to every exported symbol.
Update all test names to TestSubject_Function_{Good,Bad,Ugly} convention.
Co-Authored-By: Virgil <virgil@lethean.io>
Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>