fix(mcp): reject flags as option values

[aiirvizionz]

Summary

• rejects another flag token where --name, --transport, --env, or --header require a value
• prevents cases like --name --transport from silently using --transport as the server name
• adds focused parseMcp coverage for rejected flag-as-value inputs and valid flag values

Tests

• node --test tests\integrations-parse-mcp.test.mjs
• npm test
• node --check src\integrations.mjs
• git diff --check