Pass IPC URL into MCP Config

[d13]

This is a first pass that will work with the bundled MCP configuration only.

See https://github.com/gitkraken/gkcli/issues/571

[d13]

WIP: https://github.com/gitkraken/vscode-gitlens/compare/feature/mcp-url

[justinrobots]

@d13 the CLI team is saying this is already done. They are waiting for the endpoints to the GL functions that they want to call.