[tm1637] Add buffer manipulation methods (#13686)

Co-authored-by: Jonathan Swoboda <154711427+swoboda1337@users.noreply.github.com>

esphome/components/tm1637/tm1637.cpp

@@ -348,6 +348,12 @@ uint8_t TM1637Display::print(uint8_t start_pos, const char *str) {
   return pos - start_pos;
 }
 uint8_t TM1637Display::print(const char *str) { return this->print(0, str); }
+
+void TM1637Display::set_buffer(const uint8_t *data, uint8_t length) {
+  uint8_t len = std::min(length, (uint8_t) sizeof(this->buffer_));
+  memcpy(this->buffer_, data, len);
+}
+
 uint8_t TM1637Display::printf(uint8_t pos, const char *format, ...) {
   va_list arg;
   va_start(arg, format);