Implement DML func and related tests

parser.go

@@ -13,14 +13,14 @@ type Parser struct {
 	Table *Table
 }
 
-func NewParser(obj any) *Parser {
+func NewParser[T any](obj T) *Parser {
 	objType := reflect.TypeOf(obj)
 	return &Parser{typ: objType}
 }
 
 // This is step 1 of the parsing, it creates the table instance and
 func (p *Parser) ParseColumns() *Table {
-	table := Table{Name: camelToSnake(p.typ.Name()), TypeName: p.typ.Name()}
+	table := Table{Name: camelToSnake(p.typ.Name()), Type: p.typ}
 
 	var columns []Column
 	for field := range p.typ.Fields() {