Imports of pack command

PathSynopsis
cmd/internal/archivePackage archive implements reading of archive files generated by the Go toolchain.
cmd/internal/telemetryPackage telemetry is a shim package around the golang.org/x/telemetry and golang.org/x/telemetry/counter packages that has code build tagged out for cmd_go_bootstrap so that the bootstrap Go command does not depend on net (which is a dependency of golang.org/x/telemetry/counter on Windows).
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
ioPackage io provides basic interfaces to I/O primitives.
io/fsPackage fs defines basic interfaces to a file system.
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.