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/writer.go

@@ -54,6 +54,10 @@ type WriterOptions struct {
 	// Prisma7 enables Prisma 7-specific output for Prisma writers.
 	Prisma7 bool
 
+	// ContinueOnError instructs SQL writers to prepend `\set ON_ERROR_STOP off`
+	// to their output so that psql continues past errors instead of stopping.
+	ContinueOnError bool
+
 	// Additional options can be added here as needed
 	Metadata map[string]interface{}
 }