docs: add documentation for complex type cast support#2990

Brijesh-Thakkar wants to merge 2 commits intoapache:mainapache/datafusion-comet:mainfrom

Brijesh-Thakkar:docs-cast-complex-types-2743Brijesh-Thakkar/datafusion-comet:docs-cast-complex-types-2743Copy head branch name to clipboard