relase
Resolve the JS-side corner case reported in [forum:7774b773937cbe0a | forum post 7774b773937cbe0a] by not caching oo1.Stmt.columnCount.
Expose sqlite3_get/set_auxdata() to wasm. Minor test app CSS tweaks.
Major restructuring of opfs-sahpool to improve maintainability and hopefully make it easier to reuse these pieces in the upcoming JSPI-based VFS experiment.
Fix an age-old bug in the lower-level wasm/js helper bits which was (A) caused removal of customized WASM func/argument conversion to siltently fail and (B) triggered a warning in the closure toolchain. Reported in [jaccwabyt ticket c5c296e85a7c01360820|https://fossil.wanderinghorse.net/r/jaccwabyt/info/c5c296e85a7c01360820].