Fail to import exisiting database using OPFSCoopSyncVFS

[subframe7536]

Seems that opening OPFSCoopSyncVFS directly with flag SQLITE_OPEN_MAIN_DB | SQLITE_OPEN_CREATE | SQLITE_OPEN_READWRITE will always return SQLITE_BUSY, which breaks await check(vfs.jOpen(...)) in file demo.

The retry() function that used for resolve the promises only can be used in sqlite3 module

[subframe7536]

Just find that directly write stream to target file in OPFS will work