Add SQLDelight driver

[simolus3]

This adds a new project in the integrations folder that provides a single class: PowerSyncDriver. That class implements the SqlDriver interface from SQLDelight by forwarding queries and statements to an opened PowerSync database.

Additionally, query listeners in that driver are backed by PowerSyncDatabase.onChange, meaning that all changes between the original powersync database and the SQLDelight wrapper are visible to each other and cause reactive updates. An obvious but still pretty cool result is that updates from the sync client also trigger updates to flows in SQLDelight.

I've added a test project to run unit tests against a SQLDelight database, but no real example yet.

[Radiokot]

I just tried SQLDelight and I really liked how much safety it does bring to the creation of queries and mapping the results. Would be happy to use it on PowerSync views.

[stevensJourney]

Left some comments. This looks amazing! Happy with the implementation.

[stevensJourney]

🚀

The base branch was changed.

[Radiokot]

Simon, I see you suggest linkSqlite.set(false) in the SQLDelight gradle plugin configuration. But what if I already use SQLDelight for the local database in my app? Would I be able to use them simultaneously using SQLite native lib from PowerSync?

[simolus3]

Would I be able to use them simultaneously using SQLite native lib from PowerSync?

Yes, I think that should work. It's also worth mentioning that linkSqlite only applies to native targets, SQLDelight uses platform APIs on Android. And on native platforms linking SQLite is not required because PowerSync links it for you, so SQLDelight should just work. Let me know if you run into any issues with that though.