Add readme file 🗒

README.md

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+## JColorfulConsole
+
+### JColorfulConsole is a console color library.
+
+
+### Features:
+ - Support text color.
+ - Support background color.
+ - Support text style.
+
+### Usage:
+```java
+    ConsoleManager manager = new DefaultConsoleManager(); // Create a new console manager
+    manager.setTextColor(Color.RED); // Set text color
+    manager.setBackgroundColor(Color.BLUE); // Set background color
+   
+   manager.println("Hello World!"); // Print text
+```