npm-cache: add page

pages/common/npm-cache.md

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+# npm cache
+
+> Manage the npm package cache.
+> More information: <https://docs.npmjs.com/cli/commands/npm-cache>.
+
+- Add a specific package to the cache:
+
+`npm cache add {{package_name}}`
+
+- Remove a specific package from the cache:
+
+`npm cache remove {{package_name}}`
+
+- Clear a specific cached item by key:
+
+`npm cache clean {{key}}`
+
+- Clear the entire npm cache:
+
+`npm cache clean --force`
+
+- List the contents of the npm cache:
+
+`npm cache ls`
+
+- Verify the integrity of the npm cache:
+
+`npm cache verify`
+
+- Show information about the npm cache location and configuration:
+
+`npm cache dir`
+
+- Change the cache path:
+
+`npm config set cache {{path/to/directory}}`