How can I add a maven dependency for dremio jdbc client?

You can add the following to your maven project:

<project>
  [...]
  <repositories>
    <repository>
      <id>dremio-free</id>
      <url>https://maven.dremio.com/free/</url>
    </repository>
   </repositories>

  <dependencies>
    <dependency>
      <groupId>com.dremio.distribution</groupId>
      <artifactId>dremio-jdbc-driver</artifactId>
      <version>${dremio.version}</version>
    </dependency>
  </dependencies>
</project>