[MCP] Being able to reconnect to a SSE connection

[sebastienblanc]

Hi,

After this discussion quarkiverse/quarkus-mcp-server#102 , I'm bringing it back here.
Basically the idea is to be able to trigger the client initialization again in case the SSE connection with the server was lost. I can intercept for now the 400 status for instance return by the server, I can inject the MCPClient synthetic bean but it has no public methods to reinitiate the connection.

[geoand]

cc @jmartisk