[FEAT]: Support MCP OAuth2.1 Authorization

What would you like to see?

Support MCP servers which provide client support for MCP over streamable HTTP with OAuth 2.1 authorization works: point it at the server URL and complete the sign-in when prompted

Example: https://www.tradingview.com/mcp/docs

"mcpServers": {
	"tradingview": {
		"type": "http",
		"url": "https://mcp.tradingview.com/mcp"
	}
}

Currently responds with:

Failed to start MCP server: tradingview [401] Streamable HTTP error: Error POSTing to endpoint: {"detail":"This server requires OAuth authentication"}