Added licence, copyright and README

README.md

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+# [Bld](https://rife2.com/bld) Extension to Run Test with [TestNG](https://testng.org/)
+
+
+[![License](https://img.shields.io/badge/license-Apache%20License%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+[![Java](https://img.shields.io/badge/java-17%2B-blue)](https://www.oracle.com/java/technologies/javase/jdk17-archive-downloads.html)
+[![Release](https://flat.badgen.net/maven/v/metadata-url/repo.rife2.com/releases/com/uwyn/rife2/bld-testng/maven-metadata.xml?color=blue)](https://repo.rife2.com/#/releases/com/uwyn/rife2/bld-testng)
+[![Snapshot](https://flat.badgen.net/maven/v/metadata-url/repo.rife2.com/snapshots/com/uwyn/rife2/bld-testng/maven-metadata.xml?label=snapshot)](https://repo.rife2.com/#/snapshots/com/uwyn/rife2/bld-testng)
+[![GitHub CI](https://github.com/rife2/bld-testng/actions/workflows/bld.yml/badge.svg)](https://github.com/rife2/bld-testng/actions/workflows/bld.yml)
+
+To run the tests with TestNG:
+
+```java
+@BuildCommand(summary = "Run tests with TestNG")
+public void testng() throws Exception {
+    new TestNgOperation()
+    .fromProject(this)
+    .packages("com.example")
+    .execute();
+}
+```
+
+```text
+./bld compile testng
+```
+
+Please check the [TestNgOperation documentation](https://rife2.github.io/bld-testng/rife/bld/extension/TestNgOperation.html#method-summary) for all available configuration options.
+
+### TestNG Dependency
+
+Don't forget to add a TestNG test dependency to your build file, as it is not provided by the extension. For example:
+
+```java
+repositories = List.of(MAVEN_CENTRAL);
+scope(test).include(dependency("org.testng", "testng", version(7, 8, 0)));
+
+```