[blog post] Complex type support

### What is the problem the feature request solves?

There have been some discussions around writing technical deep dive blog posts on the DataFusion blog. I would like to see if there is interest in a blog post focussing on complex type support in Comet.

Possible topics:

- Performance challenges
- r2c and c2r transitions
- Compatibility testing across different Spark functions

### Describe the potential solution

_No response_

### Additional context

_No response_