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

tldr/npm-check

@@ -0,0 +1,25 @@
+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# npm-check
+
+> Check for outdated, incorrect, and unused npm package dependencies.
+> More information: <https://github.com/dylang/npm-check>.
+
+- Display a report of outdated, incorrect, and unused dependencies:
+
+`npm-check`
+
+- Interactively update out-of-date packages:
+
+`npm-check --update`
+
+- Update everything without prompting:
+
+`npm-check --update-all`
+
+- Don't check for unused packages:
+
+`npm-check --skip-unused`