refactor(Core): decompose handleResponse and add ToolCallingRender system

- Extract handleResponse into focused helpers: processToolCall, findTool,
  reportToolNotFound, renderToolCalling, executeToolCall
- Introduce ToolCallingRender sealed interface (Suppress/Default/Custom)
  allowing tools to control how their invocations are rendered
- Add printToolCalling to PrintAdvanceMessageHandler contract
- Implement default tool calling rendering in PrintMessageHandler (blue text)
- Add WriteFileTool for file writing capabilities
- Fix "responce" → "response" typo across Java and Python files
- Improve PythonRunner docker error handling and output messages
- Update Gradle test configuration (maxHeapSize, test logging)

Signed-off-by: zacharias <alienfromdia@proton.me>

build.gradle

@@ -25,10 +25,17 @@ subprojects {
         implementation("org.jetbrains:annotations:23.1.0")
 
         testImplementation 'org.junit.jupiter:junit-jupiter:5.10.0'
+        testRuntimeOnly 'org.junit.platform:junit-platform-launcher'
     }
 
-    test {
+    tasks.named('test', Test) {
         useJUnitPlatform()
+
+        maxHeapSize = '1G'
+
+        testLogging {
+            events "passed"
+        }
     }
 
     task sourcesJar(type: Jar, dependsOn: classes) {