Nu Shell Updates: Features, Bug Fixes, and Documentation Improvements

- jonathandturner added some notes on Nu's current progress to the README ([#1854](https://github.com/nushell/nushell/pull/1854)), added string interpolation (eg ls | echo `{{name}} is a path`) ([#1849](https://github.com/nushell/nushell/pull/1849)), updated `format` to accept variables also ([#1842](https://github.com/nushell/nushell/pull/1842)), moved error reporting from language-reporting to codespan ([#1825](https://github.com/nushell/nushell/pull/1825)), fixed a bug where starship wasn't getting sent the pwd ([#1822](https://github.com/nushell/nushell/pull/1822)), bumped dependencies ([#1809](https://github.com/nushell/nushell/pull/1809)), moved plugins to use modern it-expansion ([#1807](https://github.com/nushell/nushell/pull/1807)), added support for `$(block)` form for argument command invocation ([#1801](https://github.com/nushell/nushell/pull/1801)) - JosephTLyons added a count to `histogram` ([#1853](https://github.com/nushell/nushell/pull/1853)), made `to json` pretty print indentation configurable ([#1818](https://github.com/nushell/nushell/pull/1818)), added pretty printing to `to json` ([#1812](https://github.com/nushell/nushell/pull/1812)), cleaned up a blog post ([#23](https://github.com/nushell/blog/pull/23)) - 1ntEgr8 added a `--save` flag to `alias` to make it easier to save aliases to config ([#1852](https://github.com/nushell/nushell/pull/1852)) - cjpearce fixed the missing errors for argument invocation (eg `$(bad command)` now errors correctly) ([#1849](https://github.com/nushell/nushell/pull/1849)) - aeosynth changed the default history to 100k lines ([#1845](https://github.com/nushell/nushell/pull/1845)) - lightclient added support for setting the max history in the config ([#1837](https://github.com/nushell/nushell/pull/1837)) - thegedge removed the assuming that Value::Nothing could be used as zero ([#1836](https://github.com/nushell/nushell/pull/1836)) - matsuu fixed the canonical url for the website ([#48](https://github.com/nushell/nushell.github.io/pull/48)) - Samboy218 added documentation for the `no_auto_pivot` setting ([#1828](https://github.com/nushell/nushell/pull/1828)) - coolshaurya added docs for `shuffle` ([#1824](https://github.com/nushell/nushell/pull/1824)), removed the `-n` flag from `shuffle` ([#1823](https://github.com/nushell/nushell/pull/1823)), fixed the `insert` command to work as documented ([#1815](https://github.com/nushell/nushell/pull/1815)) - thegedge, JosephTLyons added more command examples ([#1830](https://github.com/nushell/nushell/pull/1830), [#1821](https://github.com/nushell/nushell/pull/1821)) - jzaefferer added docs to the `start` command ([#1816](https://github.com/nushell/nushell/pull/1816)) - fusepilot helped fix a typo in the contributor book ([#25](https://github.com/nushell/contributor-book/pull/25)) - andrasio removed the "test-bins" feature to make it easier to run the test suite ([#1820](https://github.com/nushell/nushell/pull/1820)), translated chapters of the book to Spanish ([#95](https://github.com/nushell/book/pull/95)) - johnterickson fixed a bug that caused `parse` to panic in some situations ([#1814](https://github.com/nushell/nushell/pull/1814)) - klnusbaum added better color palette abstraction to help colors be configurable in the future ([#1813](https://github.com/nushell/nushell/pull/1813)) -

Recent Nu shell updates include: Notes on current progress to README, string interpolation, updated format command, moving error reporting, fixing a starship bug, updating dependencies, argument command invocation, histogram enhancements, to json pretty printing, alias saving, argument invocation error fixes, history management, value handling, website URL fix, documentation updates, shuffle improvements, command examples, start command documentation, contributor book fixes, test suite improvements, Spanish translation, parse bug fix, and color palette abstraction.