[Bug]: change `JarSkillRepositoryAdapter` to `ClasspathSkillRepository`, then can't load the skill correctly

[tcsp]

Describe the bug
my code before:

try (JarSkillRepositoryAdapter repository = new JarSkillRepositoryAdapter("skills")) {
                allSkills = repository.getAllSkills();
            } catch (Exception e) {
                log.error("{} loadAgentSkill repository error:{}", getClass().getSimpleName(), e);
            }

my code after:

try (ClasspathSkillRepository repository = new ClasspathSkillRepository("skills")) {
                allSkills = repository.getAllSkills();
            } catch (Exception e) {
                log.error("{} loadAgentSkill repository error:{}", getClass().getSimpleName(), e);
            }

My code before runs correctly with agentscope-java:1.0.8, but my code after runs failed with agentscope-java:1.0.9.

related log records:

ClasspathSkillRepository       : Resource URL: jar:nested:/opt/app/xxx-app.jar/!BOOT-INF/lib/ai-provider-1.0-SNAPSHOT.jar!/skills
ClasspathSkillRepository       : Actual resource path: BOOT-INF/lib/ai-provider-1.0-SNAPSHOT.jar
ClasspathSkillRepository       : is in Jar environment: true

java.lang.RuntimeException: Failed to list skill directories
	at io.agentscope.core.skill.util.SkillFileSystemHelper.getAllSkills(SkillFileSystemHelper.java:156)
	at io.agentscope.core.skill.repository.ClasspathSkillRepository.getAllSkills(ClasspathSkillRepository.java:192)

I think the bug should occur in this part of the code.

Environment (please complete the following information):

• AgentScope-Java Version: 1.0.9
• Java Version: 17

[tcsp]

this is my pr: #837 to fix the bug