Add support for headers for MCP SSE Server

[meabhishekkumar]

Scenario : MCP server (with SSE ) that requires additional configuration to be provided. May be through headers such as Auth header, configuration settings that cannot be provided at user prompt.

Challenge : Current interface only have option to provide "name" and "server".

Expected Feature : MCP protocol does allow to add additional information . Even in MCP inspector they can be added as environment variables. It would be good to have the feature to support adding additional dictionary / headers.

[venkatest]

This would be a good feature. We are also building mcp server which will accept azure ad token as header to provide information based on user and their rights