chore: fix build and CI (#145)

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Fixes #<issue_number_goes_here> 🦕
-----
The move of the examples which was merged yesterday broke the build.
Also `-Dmaven.test.failure.ignore=true` in the CI job reported
everything as passing, even in case of failures

Author: kabir

.github/workflows/build-and-test.yml

@@ -22,4 +22,4 @@ jobs:
         distribution: 'temurin'
         cache: maven
     - name: Build with Maven
-      run: mvn -B package --file pom.xml -Dmaven.test.failure.ignore=true -fae
+      run: mvn -B package --file pom.xml -fae

examples/helloworld/pom.xml

@@ -8,6 +8,7 @@
         <groupId>io.a2a.sdk</groupId>
         <artifactId>a2a-java-sdk-parent</artifactId>
         <version>0.2.4-SNAPSHOT</version>
+        <relativePath>../../pom.xml</relativePath>
     </parent>
 
     <artifactId>a2a-java-sdk-examples-parent</artifactId>

pom.xml

@@ -183,7 +183,7 @@
         <module>sdk-jakarta</module>
         <module>sdk-quarkus</module>
         <module>tck</module>
-        <module>examples</module>
+        <module>examples/helloworld</module>
         <module>tests/server-common</module>
     </modules>
 </project>