Move pages under tldr, lint run.sh, update docs

tldr/nu

@@ -0,0 +1,26 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# nu
+
+> Nushell ("a new type of shell") takes a modern, structured approach to your command-line.
+> See also: `elvish`.
+> More information: <https://www.nushell.sh>.
+
+- Start an interactive shell session:
+
+`nu`
+
+- Execute specific commands:
+
+`nu --commands "{{echo 'nu is executed'}}"`
+
+- Execute a specific script:
+
+`nu {{path/to/script.nu}}`
+
+- Execute a specific script with logging:
+
+`nu --log-level {{error|warn|info|debug|trace}} {{path/to/script.nu}}`