Nushell #128 Updates: Extension, Documentation, and Engine-Q

# This week in Nushell #128 ## Extension - fdncred created [update info-from-package-json to 1.1.0](https://github.com/nushell/vscode-nushell-lang/pull/46) ## Documentation - Hofer-Julian created [Fix mistake introduced in #215](https://github.com/nushell/nushell.github.io/pull/216), and [Add exponential to operators](https://github.com/nushell/nushell.github.io/pull/215) ## engine-q - fdncred [fixed lines tests](https://github.com/nushell/engine-q/pull/930), and [fixed find tests](https://github.com/nushell/engine-q/pull/928), and [fixed cal tests](https://github.com/nushell/engine-q/pull/925), and [added case-insensitive sorting](https://github.com/nushell/engine-q/pull/919), and [add `--du` to `ls` command](https://github.com/nushell/engine-q/pull/917), and [`du` command](https://github.com/nushell/engine-q/pull/916), and [added defaults for colors](https://github.com/nushell/engine-q/pull/915), and [Windows ps update](https://github.com/nushell/engine-q/pull/909), and [should be inclusive](https://github.com/nushell/engine-q/pull/904), and [fixes process path being truncated](https://github.com/nushell/engine-q/pull/885), and [query command with json, web, xml](https://github.com/nushell/engine-q/pull/870) - jt [added support for quick completions](https://github.com/nushell/engine-q/pull/927), and [improved subcommand completions](https://github.com/nushell/engine-q/pull/926), and added [Command tests](https://github.com/nushell/engine-q/pull/922), and [added initial nu-test-support port](https://github.com/nushell/engine-q/pull/913), and [Add a fallback if Windows external spawn fails](https://github.com/nushell/engine-q/pull/902), and [Wait on the plugin child to prevent zombies](https://github.com/nushell/engine-q/pull/901), and [Use 'table' during internal->external](https://github.com/nushell/engine-q/pull/898), and [Ignore clippy's erroneous warnings](https://github.com/nushell/engine-q/pull/895), and [Port `detect columns`](https://github.com/nushell/engine-q/pull/892), and [Add support for `def-env` and `export def-env`](https://github.com/nushell/engine-q/pull/887), and [Variables should error on use rather than value span](https://github.com/nushell/engine-q/pull/881) - kubouch [allowed def-env to hide environment variables](https://github.com/nushell/engine-q/pull/921), and [allowed viewing the source code of blocks](https://github.com/nushell/engine-q/pull/894)

This Nushell update includes an extension update, documentation fixes and additions, and multiple improvements to engine-q. The engine-q changes include bug fixes, added features like case-insensitive sorting and a `du` command for `ls`, improvements to command completion, added support for `def-env` and `export def-env`, and updates to Windows process handling.