add tests for getCldOgImageUrl

[ghostdevv]

We use vitest for our testing suite, and the tests are located in packages/svelte-cloudinary/tests. We just need some simple tests that cover basic functionality for now

[sccalabr]

Id like to give this a try

[sccalabr]

Do I need to fill anything out for the hacktoberfest or is that something that will be handled later in the month?

[ghostdevv]

@sccalabr as long as you have a hacktoberfest account then it'll show up there soon! Colby also sent a message about how you can get some Cloudinary swag 🎉