fix: Improve file watching logic to watch files instead of directories

Author: omatheusmesmo

moqu/deployment/src/main/java/io/quarkiverse/openapi/generator/MoquProjectProcessor.java

@@ -73,8 +73,8 @@ MoquProjectBuildItem generate(MoquConfig config) {
     void watchOpenApiFiles(MoquConfig config, BuildProducer<HotDeploymentWatchedFileBuildItem> watchedPaths)
             throws IOException {
         ClassPathUtils.consumeAsPaths(config.resourceDir(), path -> {
-            if (Files.isDirectory(path)) {
-                watchedPaths.produce(new HotDeploymentWatchedFileBuildItem(path.toString(), true));
+            if (Files.exists(path)) {
+                watchedPaths.produce(new HotDeploymentWatchedFileBuildItem(path.toString(), Files.isDirectory(path)));
             }
         });
     }