feat(domains): ✨ add domain support for DrawDB integration

- Introduce Domain and DomainTable models for logical grouping of tables.
- Implement export and import functionality for domains in DrawDB format.
- Update template execution modes to include domain processing.
- Enhance documentation for domain features and usage.

pkg/writers/template/template_data.go

@@ -7,6 +7,7 @@ type TemplateData struct {
 	// One of these will be populated based on execution mode
 	Database *models.Database
 	Schema   *models.Schema
+	Domain   *models.Domain
 	Script   *models.Script
 	Table    *models.Table
 
@@ -57,6 +58,15 @@ func NewSchemaData(schema *models.Schema, metadata map[string]interface{}) *Temp
 	}
 }
 
+// NewDomainData creates template data for domain mode
+func NewDomainData(domain *models.Domain, db *models.Database, metadata map[string]interface{}) *TemplateData {
+	return &TemplateData{
+		Domain:         domain,
+		ParentDatabase: db,
+		Metadata:       metadata,
+	}
+}
+
 // NewScriptData creates template data for script mode
 func NewScriptData(script *models.Script, schema *models.Schema, db *models.Database, metadata map[string]interface{}) *TemplateData {
 	return &TemplateData{
@@ -85,6 +95,9 @@ func (td *TemplateData) Name() string {
 	if td.Schema != nil {
 		return td.Schema.Name
 	}
+	if td.Domain != nil {
+		return td.Domain.Name
+	}
 	if td.Script != nil {
 		return td.Script.Name
 	}