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

tldr/sass

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# sass
+
+> Converts SCSS or Sass files to CSS.
+> More information: <https://sass-lang.com/documentation/cli/dart-sass>.
+
+- Convert a SCSS or Sass file to CSS and print out the result:
+
+`sass {{inputfile.scss|inputfile.sass}}`
+
+- Convert a SCSS or Sass file to CSS and save the result to a file:
+
+`sass {{inputfile.scss|inputfile.sass}} {{outputfile.css}}`
+
+- Watch a SCSS or Sass file for changes and output or update the CSS file with same filename:
+
+`sass --watch {{inputfile.scss|inputfile.sass}}`
+
+- Watch a SCSS or Sass file for changes and output or update the CSS file with the given filename:
+
+`sass --watch {{inputfile.scss|inputfile.sass}}:{{outputfile.css}}`