Promote the usage of MCP

[thomasyu888]

Problem:

Synapse MCP is not being promoted right now, add a spot in the client docs for it to be promoted. (as core of the MCP is the python client)

Solution:

• Add docs
• TO DISCUSS: I'm not tied to this, if we feel like this doesn't belong here, we can remove it). Another "better" alternative is to add it here and for the MCP docs to have it's own link

Testing:

• https://synapsepythonclient--1349.org.readthedocs.build/en/1349/guides/synapse_mcp/