feat(writer): 🎉 Enhance script execution order and add symlink skipping

* Update script execution to sort by Priority, Sequence, and Name.
* Add functionality to skip symbolic links during directory scanning.
* Improve documentation to reflect changes in execution order and features.
* Add tests for symlink skipping and ensure correct script sorting.

pkg/writers/pgsql/writer_test.go

@@ -45,11 +45,11 @@ func TestWriteDatabase(t *testing.T) {
 
 	// Add unique index
 	uniqueEmailIndex := &models.Index{
-		Name:    "uk_users_email",
+		Name:    "uidx_users_email",
 		Unique:  true,
 		Columns: []string{"email"},
 	}
-	table.Indexes["uk_users_email"] = uniqueEmailIndex
+	table.Indexes["uidx_users_email"] = uniqueEmailIndex
 
 	schema.Tables = append(schema.Tables, table)
 	db.Schemas = append(db.Schemas, schema)