feat: update build workflow to include dev branch and add build badge in README

Author: Pinont

README.md

@@ -7,7 +7,7 @@ A fork of [ExperienceLib](https://github.com/pinont/ExperienceLib)
 > This project is still in development, so expect some bugs and missing features. If you find any bugs or have any feature requests, please open an issue on the [GitHub repository](https://github.com/Pinont/SingularityLib/issues)
 
 [![](https://jitpack.io/v/Pinont/SingularityLib.svg)](https://jitpack.io/#Pinont/SingularityLib) ![GitHub Tag](https://img.shields.io/github/v/tag/pinont/singularitylib)
-[![license](https://img.shields.io/github/license/pinont/singularitylib)](https://github.com/Pinont/SingularityLib/blob/main/LICENSE) 
+[![license](https://img.shields.io/github/license/pinont/singularitylib)](https://github.com/Pinont/SingularityLib/blob/main/LICENSE) [![Build & Test (No Deploy)](https://github.com/Pinont/SingularityLib/actions/workflows/build.yml/badge.svg)](https://github.com/Pinont/SingularityLib/actions/workflows/build.yml)
 
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