fix: ClasspathSkillRepository loads skill failed in multi-module java project

Author: tcsp

agentscope-core/src/main/java/io/agentscope/core/skill/repository/ClasspathSkillRepository.java

@@ -139,7 +139,8 @@ protected ClasspathSkillRepository(String resourcePath, String source, ClassLoad
             if ("jar".equals(uri.getScheme())) {
                 this.isJar = true;
                 this.fileSystem = FileSystems.newFileSystem(uri, Collections.emptyMap());
-                String actualResourcePath = uri.getSchemeSpecificPart().split("!")[1];
+                String schemeSpecificUriPath = uri.getSchemeSpecificPart();
+                String actualResourcePath = schemeSpecificUriPath.substring(schemeSpecificUriPath.lastIndexOf("!") + 1);
                 logger.info("Actual resource path: {}", actualResourcePath);
                 this.skillBasePath = fileSystem.getPath(actualResourcePath);
             } else {