Offline Mode - UART and GPS

[brentru]

This pull request brings UART and GPS modules into WipperSnapper's offline mode and the upcoming v2 (online) firmware.

Since these two components are completely rewritten for the WipperSnapper API-v2, they are not yet ready to be added to WipperSnapper Online until the IO Production broker supports WipperSnapper API v2.

UART (v2 refactor) 🔧 - UART has been fully refactored and rebuilt to support components other than the PM25 AQ Sensor. The UART component architecture is similar to the i2c component and provides a general driver base class (drvBase) for creating a new UART driver.

• UART now supports sensor.proto API, shared by other sensing classes
• UART may support output components (such as servos or motors) in the future, its API has been extended to allow for this capability
• NEW UART Components: PM25 AQ Sensor, US100 Ultrasonic Sensor, Adafruit Ultimate GPS Module

GPS 🛰️ - GPS functionality has been added to WipperSnapper! This is a new feature ✨

• The GPS component (src/components/gps) can support GPS modules over I2C or UART
• Supports auto-detection of Mediatek (MTK) or Ublox (UBX) GPS modules
• Support for standard NMEA parsing and logging (RMC and GGA messages only) into a standard interface (new gps.proto container)
• We have added preliminary support for the following GPS modules and products:
  • Adafruit Ultimate GPS Breakout with GLONASS + GPS - MTK MTK3339
  • Adafruit Ultimate GPS FeatherWing - MTK MTK3339
  • Adafruit Mini GPS PA1010D - MTK MTK3333
  • SparkFun GNSS Receiver Breakout - MAX-M10S

Resolves:
#360
#727
#755
#753

[brentru]

Wrong branch! See: #787