📝 package: add readme

Author: cruzdanilo

README.md

@@ -0,0 +1,21 @@
+# @exactly/lib
+
+## development
+
+### requirements
+
+- [node.js](https://github.com/asdf-vm/asdf-nodejs)
+- [pnpm](https://pnpm.io/installation)
+- [foundry](https://book.getfoundry.sh/getting-started/installation)
+
+### install
+
+```bash
+pnpm install
+```
+
+### test
+
+```bash
+pnpm test
+```