Add badges for build status, Maven Central, Java version, and license to README

Author: brunoborges

README.md

@@ -1,8 +1,13 @@
 # Copilot SDK for Java
 
+[![Build](https://github.com/copilot-community-sdk/copilot-sdk-java/actions/workflows/sdk-build.yml/badge.svg)](https://github.com/copilot-community-sdk/copilot-sdk-java/actions/workflows/sdk-build.yml)
+[![Maven Central](https://img.shields.io/maven-central/v/io.github.copilot-community-sdk/copilot-sdk)](https://central.sonatype.com/artifact/io.github.copilot-community-sdk/copilot-sdk)
+[![Java 17+](https://img.shields.io/badge/Java-17%2B-blue)](https://openjdk.org/)
+[![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
+
 Java SDK for programmatic control of GitHub Copilot CLI.
 
-> **Note:** This SDK is in technical preview and may change in breaking ways.
+> **Note:** This SDK may change in breaking ways.
 
 ## Requirements