Added Experimental Analyzer Infrastructure for Query Analysis and Planning

Why it matters

This feature provides an experimental query analyzer to enhance query analysis and planning processes. It aims to improve query optimization and execution by leveraging a new internal mechanism, offering better insights and potentially improved performance for complex queries.

How to use it

Enable the feature by setting allow_experimental_analyzer = 1 in the server configuration or at the session level to activate the new query analysis and planning infrastructure for your queries.