Refactor package structure to de.tki.comfymodels, fix compilation errors, and prioritize imported model list in search

src/main/java/de/tki/comfymodels/service/IWorkflowService.java

@@ -0,0 +1,11 @@
+package de.tki.comfymodels.service;
+
+import java.io.File;
+import java.io.IOException;
+
+public interface IWorkflowService {
+    /**
+     * Extracts the workflow JSON string from a file (JSON or PNG).
+     */
+    String extractWorkflow(File file) throws IOException;
+}