Add some basic example SDCs

@wim leers I've made an MR to add a pair of SDC's to the main XB repo but it appears that in doing so it has broken the tests and I'm unsure how to resolve them. The test (web/modules/experience_builder/tests/src/Kernel/SdcPropToFieldTypePropTest.php) appears to be coded to expect a certain set of SDCs but I don't know how to re-generate the data being compared in the test to include the new SDCs that I've added.

Thanks — I'll get those fixed!

This will also help make 📌 Add component instance edit form to contextual panel RTBC 's MR (https://git.drupalcode.org/project/experience_builder/-/merge_requests/53) smaller 👍

Done.

This was a soft blocker to 📌 Add component instance edit form to contextual panel RTBC — allowing that MR to become smaller again. 👍

Automatically closed - issue fixed for 2 weeks with no activity.