fix: README has a broken link to examples (#134)

# Description

Fixing broken link and moving example to a proper directory

Fixes #133  🦕

Author: jesuino

README.md

@@ -338,13 +338,13 @@ AgentCard agentCard = A2A.getAgentCard("http://localhost:1234");
 
 ### Hello World Example
 
-A complete example of an A2A client communicating with a Python A2A server is available in the [examples/helloworld](src/main/java/io/a2a/examples/helloworld) directory. This example demonstrates:
+A complete example of an A2A client communicating with a Python A2A server is available in the [examples/helloworld](examples/helloworld) directory. This example demonstrates:
 
 - Setting up and using the A2A Java client
 - Sending regular and streaming messages
 - Receiving and processing responses
 
-The example includes detailed instructions on how to run both the Python server and the Java client using JBang. Check out the [example's README](examples/client/src/main/java/io/a2a/examples/helloworld/README.md) for more information.
+The example includes detailed instructions on how to run both the Python server and the Java client using JBang. Check out the [example's README](examples/helloworld/client/src/main/java/io/a2a/examples/helloworld/README.md) for more information.
 
 ## License