Weather Station - Add support for Nor Tec 73409

[diedburn]

Hi I have a nor-tec weatherstation like some of my neigbours (which i know because i have been leeching of their outdoor sensors for a while now) which is why i would like to be able to read them with my flipper (switching channels on the receiver is a hassle)

FCC-ID;
I am unable to find a FCC-ID, neither reveiver, transmittor, manual or package has any clear labeled FCC-ID.

Frequency and modulation type
The transmitter sends at 433,92 MHz
Modulation type unsure, might be AM can be FM.

Recordings with corresponding data shown on the station:
https://github.com/diedburn/nortec_flipper_rec

If there is any additional information that could help I will do my best to provide it.

[skotopes]

@diedburn there are valid OOK records there, we'll have to wait till @Skorpionm will have free time for this protocol. He may come here for additional information