Adding MCP call (via HTTP)

[amin-nikanjam]

Please specify parts of this PR update:

• Specification
• Schema
• Examples
• Extensions
• Use Cases
• Community
• CTK
• Other

Discussion or Issue link:

What this PR does:

Additional information:

[ricardozanini]

Thank you! I have a few questions if you don't mind.

[cdavernas]

@amin-nikanjam Could you please sign-off your commits?

[amin-nikanjam]

@amin-nikanjam Could you please sign-off your commits?

Done!

[cdavernas]

@amin-nikanjam DCO is still not passing. Please follow the steps enumerated in the following link to ensure it checks: https://github.com/serverlessworkflow/specification/pull/1116/checks?check_run_id=49885563716

[cdavernas]

@amin-nikanjam Why are we not supporting stdio transport, too? I feel it is but trivial to add support for it, isn't it?

[amin-nikanjam]

@amin-nikanjam Why are we not supporting stdio transport, too? I feel it is but trivial to add support for it, isn't it?

Right, we are not supporting the stdio now. While in MCP spec it is clarified that "Clients SHOULD support stdio whenever possible", we can add it.

[ricardozanini]

@amin-nikanjam apart from adding stido, can you please check the CI?

[ricardozanini]

@amin-nikanjam can you please squash and sign your commit?