bmp388 bringup

[rland93]

• [x] bring in driver https://docs.rs/bmp388/0.1.0/bmp388/
• [x] create example application bbu-bmp388
• [x] write RTT log stubs for bmp388 error types
• [x] set up i2c (pins, HAL)
• [x] read out chipID of the sensor to ensure i2c1 bus is working properly
• [x] read out pressure reading
• [x] read out temperature reading
• [x] exercise configuration of the sensor that is supported by the driver