GPS refactored (#262)

- Refactored GPS service and HAL: GPS is no longer part of the HAL configuration. You can now add configure new GPS devices from the GPS settings app.
- T-Deck adds a boot hook to check if a GPS configuration exists and adds it when the config is empty.
- Implemented the concept of ObjectFile to read/write arrays of a raw data type (e.g. struct) to disk.
- Implemented more file utils (e.g. to create all directories of a path)

Documentation/wiring.md

@@ -0,0 +1,23 @@
+# 4 Pin connectors
+
+Many devices have 4-pin connectors:
+Either a [Grove](https://docs.m5stack.com/en/start/interface/grove) connector or a [JST](https://en.wikipedia.org/wiki/JST_connector) one.
+
+Boards that implement an I2C/UART configuration for such a connector are advised to always implement both.
+To make it consistent, it's important that the pins are mapped in the same manner:
+
+## I2C Pins
+
+Follow the Grove layout:
+
+Black(GND) - Red(5V) - Yellow(SDA) - White(SCL)
+
+## I2C Pins
+
+Follow this Grove layout on the MCU board:
+
+Black(GND) - Red(5V) - Yellow(RX) - White(TX)
+
+And this Grove layout on the peripheral:
+
+Black(GND) - Red(5V) - Yellow(TX) - White(RX)