Add Tesla charge port opener decoder

[nunojpg]

Sample: merbanan/rtl_433_tests#392

[zuckschwerdt]

Thanks! Can you add some comments to the top (similar to other conf files)? From your notes, like:

• r=1200 and t=20 are minimum values confirmed to work with this hardware, but larger values should be used for tolerance.
• The relevant signal is repeated 10 times, while there is in fact a different and unique leading signal. This might be nuisance on circuit start.
• There are no unique codes or transmissions variants. The code is the same for all Tesla charge port handles and there is a single button.
• The transmitter hardware is reported to be using a Si4010.
• There is always 2 rows = 094aa9b38da19 and 1 row = 094aa9b38da18.

[nunojpg]

@zuckschwerdt thanks, pushed.