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packages/dev-utils/README.md

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+# Shared Package
+
+This package contains code which could helps you to develop.
+To use the code in the package, you need to add the following to the package.json file.
+
+```json
+{
+  "devDependencies": {
+    "@extension/dev-utils": "workspace:*"
+  }
+}
+```
+
+## Additional Information
+
+`lib/shared-types.ts` contains the types from [type-fest](https://github.com/sindresorhus/type-fest?tab=readme-ov-file#install).