Feat: add TCADP Parser (#10775)

### What problem does this PR solve?

This PR adds a new TCADP (Tencent Cloud Advanced Document Processing)
parser to RAGFlow, enabling users to leverage Tencent Cloud's document
parsing capabilities for more accurate and structured document
processing. The implementation includes:
New TCADP Parser: A complete implementation of Tencent Cloud's document
parsing API without SDK dependency
Configuration Support: Added configuration options in service_conf.yaml
for Tencent Cloud API credentials
Frontend Integration: Updated UI components to support the new TCADP
parser option
Error Handling: Comprehensive error handling and retry mechanisms for
API calls
Result Processing: Support for both SSE streaming and JSON response
formats from Tencent Cloud API

### Type of change

- [x] New Feature (non-breaking change which adds functionality)

---------

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

conf/service_conf.yaml

@@ -133,3 +133,9 @@ user_default_llm:
 #     - "RAGFlow" # display name
 #     - "" # sender email address
 #   mail_frontend_url: "https://your-frontend.example.com"
+# tcadp_config:
+#  secret_id: 'tencent_secret_id'
+#  secret_key: 'tencent_secret_key'
+#  region: 'tencent_region'
+#  table_result_type: '1'
+#  markdown_image_response_type: '1'