Imports of configgen command

PathSynopsis
bytesPackage bytes implements functions for the manipulation of byte slices.
encoding/jsonPackage json implements encoding and decoding of JSON as defined in RFC 7159.
errorsPackage errors implements functions to manipulate errors.
flagPackage flag implements command-line flag parsing.
fmtPackage fmt implements formatted I/O with functions analogous to C's printf and scanf.
go/versionPackage version provides operations on [Go versions] in [Go toolchain name syntax]: strings like "go1.20", "go1.21.0", "go1.22rc2", and "go1.23.4-bigcorp".
golang.org/x/mod/semverPackage semver implements comparison of semantic version strings.
golang.org/x/telemetry/internal/chartconfigThe chartconfig package defines configuration that specifies both the data that is uploaded to telemetry.go.dev, and the resulting charts that are rendered.
golang.org/x/telemetry/internal/telemetryPackage telemetry manages the telemetry mode file.
logPackage log implements a simple logging package.
osPackage os provides a platform-independent interface to operating system functionality.
os/execPackage exec runs external commands.
path/filepathPackage filepath implements utility routines for manipulating filename paths in a way compatible with the target operating system-defined file paths.
regexpPackage regexp implements regular expression search.
slicesPackage slices defines various functions useful with slices of any type.
sortPackage sort provides primitives for sorting slices and user-defined collections.
stringsPackage strings implements simple functions to manipulate UTF-8 encoded strings.