Build tag request: SQLITE_ENABLE_DBPAGE_VTAB

[rishi-kulkarni]

With the release of SQLite 3.47.0, the SQLITE_DBPAGE virtual table has been updated to do some pretty powerful stuff, including writing and deleting the underlying DB pages via a SQL API. This virtual table is enabled via a compile-time option that'd be nice to have as a build flag: https://www.sqlite.org/compile.html#enable_dbpage_vtab

https://www.sqlite.org/dbpage.html

I'm happy to make a PR exposing this option as a build tag.