std
`std` facadeWe should revisit some APIs in libstd
`libstd` now that the facade effort is complete.
For example, the treatment of environment variables in the new
Command
`Command` API is waiting on access to hashtables before being
approved.
Potential for standard conversion traits (to
`to,
`, into
`into,
`, as
`as`).
Probably many other opportunities here.