I am releasing the Board Manager for MINHF4. There are 2 choices, but before going both ways, you have to install STM32 Cores from ST first by using this JSON Link and put it into Preferences menu:
Then, you can install MINHF4 board by these 2 ways:
The first one is to put this JSON Link into your Preferences in Arduino and it should be in the Board Manager of Arduino IDE:
The second way is to install manually by downloading my MinhF4 Github and copy "MinhF4" folder inside "Release" folder into Hardware folder in Arduino.
Anyways, Happy Valentine!!