Update Foundation Record Layer documentation in light of SQL API

[hatyo]

The Foundation Record Layer FAQ page contains outdated information that needs to be refreshed. For instance, the current FAQ states:

Is SQL supported? No. Currently the Record Layer has no query language, however it does expose a query API and a query planner. In the future it is possible that the Record Layer may develop a formal query language, but it is unlikely that such a language would closely resemble the SQL standard.

This information no longer accurately represents the Record Layer's capabilities. The page should be updated to document the current functionality, particularly the modern SQL support that has since been implemented.

[hatyo]

The README file is also out of date:

Queries - The Record Layer does not provide a query language, however it provides query APIs with the ability to scan, filter, and sort across one or more record types, and a query planner capable of automatic selection of indexes.