~ruther/vhdl-i2c

ref: 14be5e836538e548dfdb96b9919fc069b4cb5a8f vhdl-i2c/vivado/nsv_i2c.srcs d---------
chore: update constraints for master ssd1306
tests: add mcu tests working with slave top designs
chore: add Vivado project for Basys 3 board