### What problem does this PR solve?
- Fix incomplete curl command in section 5 'Tool calling', add missing
closing braces and parentheses to complete the JSON payload
This resolves the incomplete bash script that was missing proper JSON
structure closure.
### Type of change
- [x] Documentation Update
### What problem does this PR solve?
Add documentation for MCP streamable-http transport.
### Type of change
- [x] Documentation Update
---------
Co-authored-by: writinwaters <93570324+writinwaters@users.noreply.github.com>
### What problem does this PR solve?
Add curl example for interacting with the RAGFlow MCP server. Special
thanks to @writinwaters for his expert refinement.
### Type of change
- [x] Documentation Update
---------
Co-authored-by: writinwaters <cai.keith@gmail.com>
### What problem does this PR solve?
Add documentation of authorization header for MCP server based on OAuth
2.1
### Type of change
- [x] Documentation Update
---------
Co-authored-by: writinwaters <93570324+writinwaters@users.noreply.github.com>
### What problem does this PR solve?
_Briefly describe what this PR aims to solve. Include background context
that will help reviewers understand the purpose of the PR._
### Type of change
- [x] Documentation Update
