added README file and preview

README.md

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+# rs_blocks
+A minimal fast dwm status bar written in **Rust** 🦀
+<p>
+<img align="center" src="./screenshots/1.png"/>
+</p><br/>
+
+## Features
+* Time/Date
+* Used Memory
+* Used Disk space
+* Minimal, Fast
+
+## Note
+This tool is still in development stage.
+
+## Contributions
+All Contributions are welcome.
+
+## License
+[MIT](./LICENSE)