lerna: add page (#7742)

Co-authored-by: Axel Navarro <navarroaxel@gmail.com>

pages/common/lerna.md

@@ -0,0 +1,24 @@
+# lerna
+
+> A tool for managing JavaScript projects with multiple packages.
+> More information: <https://lerna.js.org>.
+
+- Initialize project files (`lerna.json`, `package.json`, `.git`, etc.):
+
+`lerna init`
+
+- Install all external dependencies of each package and symlink together local dependencies:
+
+`lerna bootstrap`
+
+- Run a specific script for every package that contains it in its `package.json`:
+
+`lerna run {{script}}`
+
+- Execute an arbitrary shell command in every package:
+
+`lerna exec -- {{ls}}`
+
+- Publish all packages that have changed since the last release:
+
+`lerna publish`