refactor(core): switch from room to sqldelight

sqldelight provides far more control over the sql and allows me to make
more optimisations such as removing generated rowid etc. sql also just
looks better than the annotation hell from room.

core/src/commonMain/kotlin/moe/lava/banksia/core/model/Stop.kt

@@ -10,6 +10,6 @@ data class Stop(
     val pos: Point,
     val parent: String?,
     val hasWheelChairBoarding: Boolean,
-    val level: String,
-    val platformCode: String,
+    val level: String?,
+    val platformCode: String?,
 )

core/src/commonMain/kotlin/moe/lava/banksia/core/model/Trip.kt

@@ -7,9 +7,9 @@ data class Trip(
     val id: String,
     val routeId: String,
     val service: Service,
-    val shapeId: String?,
+    val shapeId: String,
     val tripHeadsign: String,
     val directionId: String,
-    val blockId: String,
-    val wheelchairAccessible: String,
+    val blockId: String?,
+    val wheelchairAccessible: Boolean,
 )