Update documentation to use '存储库' instead of '项目'

Replaced occurrences of '项目' (project) with '存储库' (repository) across issue templates, contributing guide, and README for consistency and clarity. Updated badges, usage examples, and contribution instructions to reflect this terminology change. No functional code changes were made.

.github/pull_request_template.md

@@ -92,7 +92,7 @@
 
 ### 代码质量
 
-- [ ] 代码遵循项目编码规范
+- [ ] 代码遵循存储库编码规范
 - [ ] 添加了必要的注释
 - [ ] 没有遗留的调试代码
 - [ ] 处理了所有可能的错误情况