Exposed the rowMode parameter of exec, plus some small README fixes

[apatil]

This change does the following:

• Surfaces the rowMode parameter in the bundlide SqliteClient and SqliteWorker.
• Sets the default to 'object', which seems like the more common case. The first example in both sql.js' and the sqlite3 NPM packages' READMEs both fetch rows as objects.
• Fixes a small issue in the README and adds a pointer to the "OO TypeScript types #1" API docs.

[tomayac]

LGTM

[sgbeal]

Just for future reference regarding the links to the main docs: /doc/tip/... will always point to the most current version, no matter what branch it's on, whereas /doc/trunk/... will always point to the current trunk (which corresponds to the upstream trunk state). With only rare exceptions, /tip and /trunk are the same versions, but on rare occasion an upcoming-feature branch is used in that repo, and /tip would resolve to that branch.

[tomayac]

Are you saying that the README thus should be linking to /doc/trunk/ instead?

[sgbeal]

It's not a "must," it just seemed worth pointing out. In that particular repository it's rare that branches are used, so there's no functional difference most of the time.

[tomayac]

Understood. Since this reflects trunk release cadence, let's link to that path then.