npm-ls: add page (#14769)

* npm-ls: add page

* Improve wording

* Add alias page

* Fix typo

* Fix styling of description

---------

Co-authored-by: Sebastiaan Speck <12570668+sebastiaanspeck@users.noreply.github.com>
Co-authored-by: Wiktor Perskawiec <git@spageektti.cc>

pages/common/npm-list.md

@@ -0,0 +1,7 @@
+# npm list
+
+> This command is an alias of `npm ls`.
+
+- View documentation for the original command:
+
+`tldr npm ls`

pages/common/npm-ls.md

@@ -0,0 +1,24 @@
+# npm ls
+
+> Print installed packages to `stdout`.
+> More information: <https://docs.npmjs.com/cli/commands/npm-ls>.
+
+- Print all versions of direct dependencies to `stdout`:
+
+`npm ls`
+
+- Print all installed packages including peer dependencies:
+
+`npm ls --all`
+
+- Print dependencies with extended information:
+
+`npm ls --long`
+
+- Print dependencies in parseable format:
+
+`npm ls --parseable`
+
+- Print dependencies in JSON format:
+
+`npm ls --json`