Added I2C support for raspi & first rework of debugging

src/bus/uart/uart.cpp

@@ -0,0 +1,15 @@
+#include <sta/bus/uart/uart.hpp>
+
+namespace sta
+{
+    UART::UART(const UARTSettings & settings, Mutex * mutex)
+        : Interface{mutex}, settings_{settings}
+    {
+        
+    }
+
+    const UARTSettings & UART::settings()
+    {
+        return settings_;
+    }
+} // namespace sta