Nu Shell Updates - This Week in Nu #37

# This week in Nu #37 - nespera improved our filesize unit parser ([#1693](https://github.com/nushell/nushell/pull/1693)), added docs for `wrap` ([#1704](https://github.com/nushell/nushell/pull/1704)) - fdncred parallelized plugin loading, dramatically speeding it up ([#1694](https://github.com/nushell/nushell/pull/1694)) - JosephTLyons cleaned up some logic in file handling ([#1692](https://github.com/nushell/nushell/pull/1692)), added directory sizes to `ls` ([#1696](https://github.com/nushell/nushell/pull/1696)), fixed some `ls` column bugs ([#1705](https://github.com/nushell/nushell/pull/1705)) - jzaefferer added docs for `alias` ([#1697](https://github.com/nushell/nushell/pull/1697)), fixed the new `to` and `from` subcommand docs ([#1711](https://github.com/nushell/nushell/pull/1711), [#1712](https://github.com/nushell/nushell/pull/1712), [#1715](https://github.com/nushell/nushell/pull/1715)) - jonathandturner fixed a bug where `each` wasn't showing errors ([#1707](https://github.com/nushell/nushell/pull/1707)), added subcommands and changed `to-*` and `from-*` to use them ([#1708](https://github.com/nushell/nushell/pull/1708)), added `with-env` command to temporarily add environment variables ([#1717](https://github.com/nushell/nushell/pull/1717)), added bash-like shorthand for `with-env` ([#1718](https://github.com/nushell/nushell/pull/1718)), fixed a bug when changing to Windows drive ([#1721](https://github.com/nushell/nushell/pull/1721)) - thegedge fixed an issue with externals closing gave a pipeline error ([#1723](https://github.com/nushell/nushell/pull/1723)) - andrasio renamed `edit` to `update` ([#1724](https://github.com/nushell/nushell/pull/1724)) and `pick` to `select` ([#1725](https://github.com/nushell/nushell/pull/1725)) - 1ntEgr8 added a `start` command to automatically load apps based on file type ([#1727](https://github.com/nushell/nushell/pull/1727)) - JesterOrNot improved our Gitpod integration ([#1728](https://github.com/nushell/nushell/pull/1728))

This week's Nu Shell updates include improvements to the filesize unit parser, parallelized plugin loading, file handling logic cleanup, adding directory sizes to `ls`, documentation updates for `alias` and `wrap`, bug fixes for `each` and Windows drive changes, addition of `with-env` command and bash-like shorthand, renaming `edit` to `update` and `pick` to `select`, adding a `start` command for file type-based app loading, and Gitpod integration improvements.