Document Delta Table optimization in a single entrypoint

With the improvements of Delta Table and the previous existing optimizations, it becomes a little bit harder to wrap our head around it.

- Data skipping via statistics
- Data skipping improved via Z Index
- Bloom Filters
- Liquid Clustering
- Merge on Read

Other random ideas add here ... @MrPowers

No file, test, or entry point is named. Start by locating the website’s existing Delta Table optimization content, then consolidate the listed topics into one entry point; done means the five named optimizations and any agreed additions are documented together.

Written by the indexing model from the issue text.