Implement SEP-1036: URL Mode Elicitation for secure out-of-band interactions

[tanish111]

Is your feature request related to a problem? Please describe.
Introduces an important security feature(URL Mode Elicitation) that allows sensitive or third-party interactions (like OAuth or payment flows) to happen safely outside the client, as described in modelcontextprotocol/modelcontextprotocol#887, which is accepted for the next version of the MCP spec.

Describe the solution you'd like
Implement all features as described in SEP-1036