add on_rc_switch trigger (#983)

esphome/components/remote_base/rc_switch_protocol.cpp

@@ -127,6 +127,19 @@ bool RCSwitchBase::decode(RemoteReceiveData &src, uint64_t *out_data, uint8_t *o
   }
   return true;
 }
+optional<RCSwitchData> RCSwitchBase::decode(RemoteReceiveData &src) const {
+  RCSwitchData out;
+  uint8_t out_nbits;
+  for (uint8_t i = 1; i <= 8; i++) {
+    src.reset();
+    RCSwitchBase *protocol = &rc_switch_protocols[i];
+    if (protocol->decode(src, &out.code, &out_nbits) && out_nbits >= 3) {
+      out.protocol = i;
+      return out;
+    }
+  }
+  return {};
+}
 
 void RCSwitchBase::simple_code_to_tristate(uint16_t code, uint8_t nbits, uint64_t *out_code) {
   *out_code = 0;