Persist desktop database

examples/todo/common/database/src/commonMain/sqldelight/example/todo/common/database/TodoDatabase.sq

@@ -1,4 +1,4 @@
-CREATE TABLE TodoItemEntity (
+CREATE TABLE IF NOT EXISTS TodoItemEntity (
     id INTEGER PRIMARY KEY AUTOINCREMENT,
     orderNum INTEGER NOT NULL,
     text TEXT NOT NULL,

examples/todo/common/database/src/desktopMain/kotlin/example/todo/common/database/TodoDatabaseDriverFactory.kt

@@ -3,10 +3,12 @@ package example.todo.common.database
 import com.squareup.sqldelight.db.SqlDriver
 import com.squareup.sqldelight.sqlite.driver.JdbcSqliteDriver
 import example.todo.database.TodoDatabase
+import java.io.File
 
 @Suppress("FunctionName") // FactoryFunction
 fun TodoDatabaseDriver(): SqlDriver {
-    val driver = JdbcSqliteDriver(JdbcSqliteDriver.IN_MEMORY)
+    val databasePath = File(System.getProperty("java.io.tmpdir"), "ComposeTodoDatabase.db")
+    val driver = JdbcSqliteDriver(url = "jdbc:sqlite:${databasePath.absolutePath}")
     TodoDatabase.Schema.create(driver)
 
     return driver