Add FujitsuAC library (#6760)

Author: Benas09

repositories.txt

@@ -8270,4 +8270,5 @@ https://github.com/teldrive-jpg/modbusmaster-GigaR1
 https://github.com/kodediy/kode_bq27220
 https://github.com/ArtronShop/TinkerC6_Library
 https://github.com/tobiastl/LD2412
+https://github.com/Benas09/FujitsuAC
 https://github.com/TektiteBiz/TektiteRotEv