Select enhancement (#3423)

Co-authored-by: Maurice Makaay <mmakaay1@xs4all.net>

esphome/components/select/select_traits.cpp

@@ -0,0 +1,11 @@
+#include "select_traits.h"
+
+namespace esphome {
+namespace select {
+
+void SelectTraits::set_options(std::vector<std::string> options) { this->options_ = std::move(options); }
+
+std::vector<std::string> SelectTraits::get_options() const { return this->options_; }
+
+}  // namespace select
+}  // namespace esphome