~ruther/vhdl-i2c

ref: 5cb9dd034e44f6cf6a2a9d1bea27b6962ad1058b 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
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