Nushell Updates: Features, Fixes, and Documentation Enhancements

- fdncred [added case_sensitive_completions config option](https://github.com/nushell/nushell/pull/5646) - WindSoilder [made cp can copy folders contains dangling symbolic link](https://github.com/nushell/nushell/pull/5645), and [make sure no duplicate column exists during eval and merge](https://github.com/nushell/nushell/pull/5633), and [fix date format](https://github.com/nushell/nushell/pull/5619), and [load config when requried](https://github.com/nushell/nushell/pull/5618), and [Make flatten works better and predictable](https://github.com/nushell/nushell/pull/5611) - VergeDX [allowed specific table width with `-w`, like command `grid`.](https://github.com/nushell/nushell/pull/5643) - jt [bumped to dev version](https://github.com/nushell/nushell/pull/5635), and [Bump to 0.63](https://github.com/nushell/nushell/pull/5627) - hustcer [fixed typo for `version` command](https://github.com/nushell/nushell/pull/5610) - Kangaxx-0 [added config command](https://github.com/nushell/nushell/pull/5607) - toffaletti [added octal binary literals](https://github.com/nushell/nushell/pull/5604) ## Documentation - kubouch created [Fix config variable name](https://github.com/nushell/nushell.github.io/pull/459), and [Add 'overlay new' tip](https://github.com/nushell/nushell.github.io/pull/457), and [Add overlays chapter](https://github.com/nushell/nushell.github.io/pull/456), and [Create overlays.md stub](https://github.com/nushell/nushell.github.io/pull/447) - schuelermine created [book/operators.md: add `not` operator](https://github.com/nushell/nushell.github.io/pull/458), and [book/nushell_map_functional.md: add mapM as Haskell equiv. of each](https://github.com/nushell/nushell.github.io/pull/452), and [Fix inverted “shebang” in book/scripts.md](https://github.com/nushell/nushell.github.io/pull/451) - jgollenz created [Rename 'pivot' to 'transpose' in parsing_git_log.md](https://github.com/nushell/nushell.github.io/pull/455), and [Remove dangling backtick](https://github.com/nushell/nushell.github.io/pull/453)

Recent Nushell updates include a case-sensitive completions config option, improvements to the `cp` command for handling symbolic links, fixes for duplicate columns during evaluation and merging, date format corrections, and improved `flatten` command behavior. A specific table width option was added, the version was bumped to dev, a typo in the version command was fixed, and a config command was added. Additionally, octal binary literals were introduced. Documentation updates include fixes to config variable names, tips for using `overlay new`, the addition of an overlays chapter, the inclusion of the 'not' operator, Haskell equivalents for `each`, and corrections to the parsing_git_log.md file.