update dependencies and enhance documentation for A2A agent; improve README and FAQ sections

Author: vishalmysore

pom.xml

@@ -6,7 +6,7 @@
 
     <groupId>io.github.vishalmysore</groupId>
     <artifactId>a2ajava</artifactId>
-    <version>0.1.9.5</version>
+    <version>0.1.9.6</version>
     <name>A2A Protocol Implementation for Java</name>
     <description>
         Java implementation of the A2A protocol, which allows for the exchange of data between different AI systems.

src/main/java/io/github/vishalmysore/common/CommonClientResponse.java

@@ -53,7 +53,7 @@ default String getTextResult() {
             }
             return "";
         } else {
-            throw new IllegalStateException("Unexpected response type: " + this.getClass());
+            throw new IllegalStateException("Unexpected response type inside CommonClientResponse class: " + this.getClass());
         }
     }