Separate exec types into files, document code (#10)

Reviewed-on: #10

exec/select.go

@@ -22,7 +22,7 @@ type Select[T any] struct {
 }
 
 // Creates the select query builder
-func CreateSelect[T any](orm *simpleorm.ORM) (Select[T], error) {
+func NewSelect[T any](orm *simpleorm.ORM) (Select[T], error) {
 	table, ok := orm.Cache().Get(reflect.TypeFor[T]().Name())
 	if !ok {
 		return Select[T]{}, errors.New("Failed to get table from schema cache")