Added Argument System

README.MD

@@ -11,6 +11,31 @@ and a wide set of math/number/string/file/reflection helpers.
 - Command system: command manager, permissions, execution events
 - Network system: TCP/UDP transport, packet handling, optional TLS, UDP encryption
 - Utilities: math/number helpers, strings, colors, files, reflection, logging
+ - Argument parsing: register arguments, validate values, run callbacks
+
+## ArgumentParser
+Basic usage
+```java
+ArgumentParser parser = new ArgumentParser(args);
+
+Argument verbose = new Argument("verbose", "Enable verbose output", false);
+verbose.setRun((arg, value) -> System.out.println("Verbose on"));
+parser.registerArgument(verbose);
+
+Argument mode = new Argument("mode", "Run mode", true, true, false, List.of("dev", "prod"));
+mode.setRun((arg, value) -> System.out.println("Mode: " + value.orElse("")));
+parser.registerArgument(mode);
+
+parser.runArguments();
+```
+
+Value rules
+- Constructor: `Argument(name, description, required, requireValue, optionalValue, values)`
+- `requireValue=false` and `optionalValue=false`: argument has no value
+- `requireValue=true` and `optionalValue=false`: value must be present
+- `requireValue=false` and `optionalValue=true`: value is optional
+- `requireValue=true` and `optionalValue=true` is not allowed
+- If `values` is not empty, the provided value must be in that list
 
 ## License Information
 GNU General Public License v3.0 (GPLv3)<br />