~ruther/vhdl-i2c

ref: e466c60fbc67ee45e4f59cb6928bac3ab98ddb0d vhdl-i2c/vivado/nsv_i2c.srcs/constrs_1 d--------- 
tests: add mcu tests working with slave top designs

chore: add Vivado project for Basys 3 board
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