## Summary
- Add validation that URL must be empty for stdio transport types
- Rename `validateTransport` to `validateRemoteTransport` for better
clarity
- Update corresponding test case to expect error when stdio transport
has URL
## Context
This addresses two specific feedback comments from @domdomegg on PR
#345:
1. "do we want to validate the the url _is_ empty?" - Now validates URL
is empty for stdio
2. "maybe rename validateRemoteTransport or something?" - Renamed
function for clarity
The changes enforce stricter validation while improving code readability
through better naming.
e9884c1d7b