fix: remove 'No authorization' from outbound auth options

MCP server targets require OAuth or API Key credential providers.
GATEWAY_IAM_ROLE is not supported for MCP server targets. Since
MCP server is the only target type in Phase 1, remove the NONE
option entirely.

Author: aidandaly24

src/cli/tui/screens/mcp/types.ts

@@ -121,7 +121,6 @@ export const COMPUTE_HOST_OPTIONS = [
 ] as const;
 
 export const OUTBOUND_AUTH_OPTIONS = [
-  { id: 'NONE', title: 'No authorization', description: 'No outbound authentication' },
   { id: 'OAUTH', title: 'OAuth 2LO', description: 'OAuth 2.0 client credentials' },
   { id: 'API_KEY', title: 'API Key', description: 'API key authentication' },
 ] as const;