feat(image): add image upload functionality

- Created FileUploadResponse DTO for image upload responses
- Implemented ImageController with upload endpoint
- Defined ImageService interface for image operations
- Added ImageServiceImpl with placeholder upload logic
- Updated pom.xml to include chaos_api_domain dependency

chaos_api_domain/src/main/java/cn/nopj/chaos_api/dto/FileUploadResponse.java

@@ -0,0 +1,13 @@
+package cn.nopj.chaos_api.dto;
+
+import lombok.Data;
+
+@Data
+public class FileUploadResponse {
+    private String fileName;
+    private String fileDownloadUri;
+    private String ossBucket;
+    private String fileOSSUri;
+    private String fileType;
+    private long size;
+}