feat: di, db, and preliminary server-side gtfs parsing

shared/src/commonMain/kotlin/moe/lava/banksia/room/Database.kt

@@ -0,0 +1,28 @@
+package moe.lava.banksia.room
+
+import androidx.room.RoomDatabase
+import androidx.room.TypeConverters
+import androidx.sqlite.driver.bundled.BundledSQLiteDriver
+import kotlinx.coroutines.Dispatchers
+import kotlinx.coroutines.IO
+import moe.lava.banksia.model.Route
+import moe.lava.banksia.model.RouteType
+import moe.lava.banksia.model.Shape
+import moe.lava.banksia.room.dao.RouteDao
+import moe.lava.banksia.room.dao.ShapeDao
+import androidx.room.Database as DatabaseAnnotation
+
+@DatabaseAnnotation(entities = [Route::class, Shape::class], version = 1)
+@TypeConverters(RouteType.Companion::class)
+abstract class Database : RoomDatabase() {
+    abstract fun getRouteDao(): RouteDao
+    abstract fun getShapeDao(): ShapeDao
+
+    companion object {
+        fun build(base: Builder<Database>) =
+            base.fallbackToDestructiveMigrationOnDowngrade(true)
+                .setDriver(BundledSQLiteDriver())
+                .setQueryCoroutineContext(Dispatchers.IO)
+                .build()
+    }
+}