feat(adapter): add support for cross-field ORs

[jp06]

Change Summary

Add support for cross-field ORs by grouping different fields with parentheses () and joining them with ||. Before it will just warn that this is not supported.

I had to implement this for a use case of using separate fields together for a hierarchical multi-level select.

I'm thinking it was a limitation on when this was first written which is why this hasn't implemented yet. Let me know if there are still existing limitations on this that I'm not aware of. Feel free to close if you think this will break stuff.

PR Checklist

• I have read and signed the Contributor License Agreement.

[jp06]

I noticed this open PR: #260
I got no time to scan this PR, but I will rebase if needed once this is merged.
Unless this is already supported in that PR, will appreciate if someone can let me know. Thanks!

[tharropoulos]

That PR handles JOINs specifically, but also handles facet filters alongside those. I like this approach more for a starting point myself, could you also add some tests under the testground folder?

[jp06]

@tharropoulos Thanks. I actually am thinking of another approach to my problem as I've learned some things, but I can continue this at some points to add some tests on my free time.