A from-scratch, dependency-free SQLite implementation: file format reader and
writer (b-tree read and write paths, pager, journal, WAL), a SQL lexer,
parser and AST, a planner, and an executor — plus locking, integrity checking
and a `sqlq` CLI.
It exists because the asset store needs a database on every platform the app
ships to, without a C toolchain in the build and without a system library
whose version is somebody else's decision. The test suite is the argument:
DML, DDL, concurrency, crash recovery, a query corpus and a DML fuzzer, all
checked against real SQLite behaviour rather than against our own reading of
the spec.
