fix: Update paths in example READMEs and move the READMEs to the client and server dirs

Author: fjuma

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](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/server](examples/helloworld/server/README.md) 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/helloworld/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/README.md) for more information.
 
 ## License
 

…ava/io/a2a/examples/helloworld/README.md examples/helloworld/client/README.mdexamples/helloworld/client/src/main/java/io/a2a/examples/helloworld/README.md renamed to examples/helloworld/client/README.md examples/helloworld/client/src/main/java/io/a2a/examples/helloworld/README.md renamed to examples/helloworld/client/README.md

@@ -62,7 +62,7 @@ A JBang script is provided in the example directory to make running the client e
 
 2. Navigate to the example directory:
    ```bash
-   cd examples/client/src/main/java/io/a2a/examples/helloworld
+   cd examples/helloworld/client/src/main/java/io/a2a/examples/helloworld/
    ```
 
 3. Run the client using the JBang script:

…ava/io/a2a/examples/helloworld/README.md examples/helloworld/server/README.mdexamples/helloworld/server/src/main/java/io/a2a/examples/helloworld/README.md renamed to examples/helloworld/server/README.md examples/helloworld/server/src/main/java/io/a2a/examples/helloworld/README.md renamed to examples/helloworld/server/README.md

@@ -14,7 +14,7 @@ This example demonstrates how to use the A2A Java SDK to communicate with an A2A
 The Java server can be started using `mvn` as follows:
 
 ```bash
-cd examples/server
+cd examples/helloworld/server
 mvn quarkus:dev
 ```