Add Dma feature with Usart 2 RX and TX

.devcontainer/devcontainer.json

.vscode/launch.json

.vscode/settings.json

library/stm32f072xb/dma/abstract-dma/abstract-dma-init.hpp

library/stm32f072xb/dma/abstract-dma/abstract-dma.cpp

library/stm32f072xb/dma/abstract-dma/abstract-dma.hpp

library/stm32f072xb/dma/dma-register/dma-channel.hpp

library/stm32f072xb/dma/dma-register/dma-circular-mode.hpp

library/stm32f072xb/dma/dma-register/dma-direction.hpp

...ary/stm32f072xb/dma/dma-register/dma-memory-increment.hpp

library/stm32f072xb/dma/dma-register/dma-memory-size.hpp

...stm32f072xb/dma/dma-register/dma-peripheral-increment.hpp

library/stm32f072xb/dma/dma-register/dma-peripheral-size.hpp

library/stm32f072xb/dma/dma-register/dma-peripheral.hpp

library/stm32f072xb/dma/dma-register/dma-register.hpp

library/stm32f072xb/dma/dma.cpp

library/stm32f072xb/dma/dma.hpp

...ary/stm32f072xb/gpio/abstract-gpio/abstract-gpio-init.hpp

library/stm32f072xb/meson.build

library/stm32f072xb/uart/abstract-uart/abstract-uart.cpp