Storage: Support the s3, azure blob as the object storage of ragflow. (#2278)

### What problem does this PR solve?

issue: https://github.com/infiniflow/ragflow/issues/2277

_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._

### Type of change

- [ ] Bug Fix (non-breaking change which fixes an issue)
- [x] New Feature (non-breaking change which adds functionality)
- [ ] Documentation Update
- [ ] Refactoring
- [ ] Performance Improvement
- [ ] Other (please describe):

Co-authored-by: Kevin Hu <kevinhu.sh@gmail.com>

rag/settings.py

@@ -24,6 +24,8 @@ RAG_CONF_PATH = os.path.join(get_project_base_directory(), "conf")
 SUBPROCESS_STD_LOG_NAME = "std.log"
 
 ES = get_base_config("es", {})
+AZURE = get_base_config("azure", {})
+S3 = get_base_config("s3", {})
 MINIO = decrypt_database_config(name="minio")
 try:
     REDIS = decrypt_database_config(name="redis")
@@ -43,6 +45,8 @@ LoggerFactory.LEVEL = 30
 
 es_logger = getLogger("es")
 minio_logger = getLogger("minio")
+s3_logger = getLogger("s3")
+azure_logger = getLogger("azure")
 cron_logger = getLogger("cron_logger")
 cron_logger.setLevel(20)
 chunk_logger = getLogger("chunk_logger")