feat. add readme

Author: PotatoCloud

README.md

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+# Packaged
+Elegant and efficient Golang service management. Supports environment variable binding and service startup in a specified order.
+
+### Features
+- **Service Management**: Organize and manage service startup in a predefined order.
+- **Environment Variable Binding**: Automatically bind services with environment variables to ensure proper configuration.
+- **Optimized for Efficiency**: Focused on performance and simplicity.
+- This package is a pure Go implementation with no third-party or C dependencies.
+
+### Installation
+To install this package, run the following command:
+```shell
+go get github.com/RealFax/packaged
+```
+
+### Usage
+1. **Setup Services**: Define the services you want to manage using this package.
+2. **Configure Environment Variables**: Bind necessary environment variables to each service.
+3. **Start Services**: Use the package to start services in the required order.
+
+##### Example:
+see: [https://github.com/RealFax/packaged/tree/main/example](https://github.com/RealFax/packaged/tree/main/example)
+
+### License
+This project is licensed under the GPL-3.0 License. See the [LICENSE](https://github.com/RealFax/packaged/blob/main/LICENSE) file for details.
+
+
+### Acknowledgments
+
+<a href="https://jb.gg/OpenSourceSupport"><img width="100px" src="https://resources.jetbrains.com/storage/products/company/brand/logos/jb_beam.png"/></a>