Support for AcuRite 986 Refrigrerator / Freezer Temperature sensors

[NorthernMan54]

This is just a trial pull request, before submitting a final one. I still need to validate low battery before submitting the final, but wanted to send an early draft incase I followed an incorrect approach around adding support for another sensor type. I have a motion sensor that I'm about to add as well

Changes include

• Support for AcuRite 986 Refrigrerator / Freezer Temperature sensors ( Borrowed a lot of the decode logic from rtf_443 ). Coded this as plugin 37.
• Fixes for the Alectov devices to move the duplicate message check later in Plugin 30/32 as the duplicate check was colliding for Plugin 32 and caused messages for Plugin 32 to be dropped. ( I have one of these )
• Plugin 32, made some minor tweaks and include battery support. The ID field no longer contains the button press BIT or Battery bit as I found it was changing the ID when the battery was low or the test button was pressed.

[NorthernMan54]

Tks for merging this but it has a couple of changes that you may not want to include

1 - ArduinoOTA
2 - 6_Credentials.h is removed
3 - default serial speed changed to 921600
4 - default pin changed to #define PIN_RF_RX_DATA_0 D1

[couin3]

True! I already changed 1 and 2, and will also get 3 and 4 back