npm-explain: add page (#19023)

Co-authored-by: Sebastiaan Speck <[email protected]>

Author: Ahamed1846

pages/common/npm-explain.md

@@ -0,0 +1,20 @@
+# npm explain
+
+> Explain how a package is installed, detailing its dependencies and reasons for inclusion.
+> More information: <https://docs.npmjs.com/cli/explain>.
+
+- Explain why a specific package is installed:
+
+`npm explain {{package_name}}`
+
+- Show explanation in JSON format:
+
+`npm explain {{package_name}} --json`
+
+- Include peer dependencies in the explanation:
+
+`npm explain {{package_name}} --include peer`
+
+- Limit explanation depth to 2 levels deep:
+
+`npm explain {{package_name}} --depth 2`