feat(next): group-array field support

[lukad]

This adds support for generating fields for {"type":"array"} schemas which includes:

• group-arrays (an array schema where the items subschema is an object schema)
• array schemas where the items subschema is anything else e.g. {"type": "array", "items": {"type": "string}}

[sandrina-p]

Fantastic work @lukad! Everything seems to work fine, I'm still testing against the internal MR, but so far, so good! Let's release anoter dev to run against E2E and then we can merge this ⚡

[dragidavid]

To explain the last 2 commits:

• I released a new dev version for v0 as we needed the schema updates but the version should remain on the beta as it was before

[dragidavid]

Did a final test with the new dev versions and it seems to be all good! Approving ✅