feat(writer): add continue-on-error option for SQL writers

* Introduce ContinueOnError option to WriterOptions
* Update writer functions to support continue-on-error behavior
* Modify migration and database writing to handle continue-on-error

pkg/writers/pgsql/writer.go

@@ -99,7 +99,11 @@ func (w *Writer) WriteDatabase(db *models.Database) error {
 	// Write header comment
 	fmt.Fprintf(w.writer, "-- PostgreSQL Database Schema\n")
 	fmt.Fprintf(w.writer, "-- Database: %s\n", db.Name)
-	fmt.Fprintf(w.writer, "-- Generated by RelSpec\n\n")
+	fmt.Fprintf(w.writer, "-- Generated by RelSpec\n")
+	if w.options.ContinueOnError {
+		fmt.Fprintf(w.writer, "\\set ON_ERROR_STOP off\n")
+	}
+	fmt.Fprintf(w.writer, "\n")
 
 	// Process each schema in the database
 	for _, schema := range db.Schemas {