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

shared/src/commonMain/kotlin/moe/lava/banksia/di/CommonModules.kt

@@ -0,0 +1,12 @@
+package moe.lava.banksia.di
+
+import moe.lava.banksia.room.Database
+import org.koin.dsl.module
+
+val CommonModules = module {
+    includes(PlatformModule)
+
+    single { Database.build(get<PlatformDatabaseBuilder>().getBuilder()) }
+    single { get<Database>().getRouteDao() }
+    single { get<Database>().getShapeDao() }
+}

shared/src/commonMain/kotlin/moe/lava/banksia/di/PlatformModule.kt

@@ -0,0 +1,17 @@
+package moe.lava.banksia.di
+
+import androidx.room.RoomDatabase
+import moe.lava.banksia.room.Database
+import org.koin.core.parameter.ParametersHolder
+import org.koin.core.scope.Scope
+import org.koin.dsl.module
+
+interface PlatformDatabaseBuilder {
+    fun getBuilder(): RoomDatabase.Builder<Database>
+}
+
+expect fun Scope.provideDatabaseBuilder(p: ParametersHolder): PlatformDatabaseBuilder
+
+internal val PlatformModule = module {
+    single { provideDatabaseBuilder(it) }
+}