Exports the internal simpleMock utility as createServiceMock, allowing
plugin authors to define mock creators for their own service refs
following the same pattern as the built-in mockServices mocks.
Also updates catalog-node to use createServiceMock instead of its own
copy, and simplifies the gateway-backend test to use the mock's
.factory property directly.
Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>
Co-authored-by: Cursor <cursoragent@cursor.com>
Signed-off-by: Patrik Oldsberg <poldsberg@gmail.com>