Imports of go command

PathSynopsis
cmd/go/internal/basePackage base defines shared basic pieces of the go command, in particular logging and the Command structure.
cmd/go/internal/bugPackage bug implements the “go bug” command.
cmd/go/internal/cfgPackage cfg holds configuration shared by multiple parts of the go command.
cmd/go/internal/cleanPackage clean implements the “go clean” command.
cmd/go/internal/docPackage doc implements the “go doc” command.
cmd/go/internal/envcmdPackage envcmd implements the “go env” command.
cmd/go/internal/fixPackage fix implements the “go fix” command.
cmd/go/internal/fmtcmdPackage fmtcmd implements the “go fmt” command.
cmd/go/internal/generatePackage generate implements the “go generate” command.
cmd/go/internal/get
cmd/go/internal/helpPackage help implements the “go help” command.
cmd/go/internal/listPackage list implements the “go list” command.
cmd/go/internal/modcmdPackage modcmd implements the “go mod” command.
cmd/go/internal/modfetch
cmd/go/internal/modgetPackage modget implements the module-aware “go get” command.
cmd/go/internal/modload
cmd/go/internal/runPackage run implements the “go run” command.
cmd/go/internal/test
cmd/go/internal/toolPackage tool implements the “go tool” command.
cmd/go/internal/trace
cmd/go/internal/versionPackage version implements the “go version” command.
cmd/go/internal/vetPackage vet implements the “go vet” command.
cmd/go/internal/work
contextPackage context defines the Context type, which carries deadlines, cancellation signals, and other request-scoped values across API boundaries and between processes.
flagPackage flag implements command-line flag parsing.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
logPackage log implements a simple logging package.
osPackage os provides a platform-independent interface to operating system functionality.
path/filepathPackage filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths.
runtimePackage runtime contains operations that interact with Go's runtime system, such as functions to control goroutines.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.