Install MCP server

[eamodio]

Description

• Download the mcp server installer from our release server into the vscode extension storage URI (ExtensionContext.globalStorageUri)
  • We should be downloading the platform specific version
• Once downloaded, run gk install to install the mcp server onto the machine
• Once that completes run gk mcp install
  • gk mcp install <mcp_client> --file-path <path_to_file_to_be_updated>
  • e.g. gk mcp install vscode --file-path ~/Library/Application\ Support/Code/User/settings.json
  • See https://github.com/gitkraken/gkcli/pull/237 for more details
• Once everything is successful, delete the "installer"