init project readme

Author: reugn

README.md

@@ -1 +1,47 @@
-# dev-tools
+# dev-tools
+Common development tools in one app
+
+## Installation
+This is a Maven JavaFX application.  
+Build it from source:
+```java
+mvn assembly:assembly
+```
+or download the latest release.
+
+***JavaFx is not a part of Java SDK as of JDK 11.***
+
+## Tools List
+
+### Json Editor
+* Json Pretty Print with Highlighting
+* Json Validation
+* Search Bar (Ctrl+F)
+
+![](./images/json_editor.png)
+
+### Generator
+* UUID Generator
+* Password Generator
+
+![](./images/generator.png)
+
+### Hash Calculator
+* Hash Functions
+* URL Encode/Decode
+* Base64 Encode/Decode
+
+![](./images/hash_calculator.png)
+
+### Epoch Converter
+* Current Unix Epoch Time
+* Timestamp to Human Date
+* Human Date to Timestamp
+
+![](./images/epoch_converter.png)
+
+## Contributing
+If you find this project useful and want to contribute, please open an issue or create a PR.
+
+## License
+Licensed under the Apache 2.0 License.