feat(relations): 🎉 add flatten schema option for output

* Introduce `--flatten-schema` flag to convert, merge, and split commands.
* Modify database writing functions to support flattened schema names.
* Update template functions to handle schema.table naming convention.
* Enhance PostgreSQL writer to utilize flattened schema in generated SQL.
* Update tests to ensure compatibility with new flattening feature.
* Dependencies updated for improved functionality.

pkg/writers/bun/template_data.go

@@ -106,11 +106,8 @@ func (td *TemplateData) FinalizeImports() {
 }
 
 // NewModelData creates a new ModelData from a models.Table
-func NewModelData(table *models.Table, schema string, typeMapper *TypeMapper) *ModelData {
-	tableName := table.Name
-	if schema != "" {
-		tableName = schema + "." + table.Name
-	}
+func NewModelData(table *models.Table, schema string, typeMapper *TypeMapper, flattenSchema bool) *ModelData {
+	tableName := writers.QualifiedTableName(schema, table.Name, flattenSchema)
 
 	// Generate model name: Model + Schema + Table (all PascalCase)
 	singularTable := Singularize(table.Name)

pkg/writers/bun/writer.go

@@ -86,7 +86,7 @@ func (w *Writer) writeSingleFile(db *models.Database) error {
 	// Collect all models
 	for _, schema := range db.Schemas {
 		for _, table := range schema.Tables {
-			modelData := NewModelData(table, schema.Name, w.typeMapper)
+			modelData := NewModelData(table, schema.Name, w.typeMapper, w.options.FlattenSchema)
 
 			// Add relationship fields
 			w.addRelationshipFields(modelData, table, schema, db)
@@ -181,7 +181,7 @@ func (w *Writer) writeMultiFile(db *models.Database) error {
 			templateData.AddImport(fmt.Sprintf("resolvespec_common \"%s\"", w.typeMapper.GetSQLTypesImport()))
 
 			// Create model data
-			modelData := NewModelData(table, schema.Name, w.typeMapper)
+			modelData := NewModelData(table, schema.Name, w.typeMapper, w.options.FlattenSchema)
 
 			// Add relationship fields
 			w.addRelationshipFields(modelData, table, schema, db)