Copy firmware-tool script into host tools. (#9)

# New Features
 - Copy in firmware tools for flashing LG69T devices.

firmware_tools/README.md

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+# firmware-tools
+Firmware utilities for Point One devices

firmware_tools/lg69t/README.md

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+# LG69T Firmware Tools
+
+These tools are used to manage the firmware on the Quectel LG69T family of products.
+
+The firmware consists of three files:
+- Application software
+- GNSS receiver firmware
+- Bootloader (optional)
+
+The tools require Python 3. They work in Linux, Windows and Mac.
+
+Before using the tools, install the Python requirements:
+
+```
+python3 -m pip install -r requirements.txt
+```
+
+And download the latest firmware package from
+[Point One's Developer Portal](https://pointonenav.com/docs/#standard_dev_kit).
+
+## Updating Application and GNSS Firmware
+
+> Note: To update the Application and GNSS firmware, you must use UART1 on the device (`Standard COM Port` for Windows,
+typically `/dev/ttyUSB1` in Linux for P1SDK).
+
+To update the firmware on a device, use the following steps:
+1. Determine the correct serial port name to communicate with UART1 on your device.
+   - In Windows, look for the COM port number of the "Standard COM Port" in Device Manager
+   - In Linux/Mac OS, run `ls -l /dev/ttyUSB*`
+2. Update the device, specifying the correct port and desired software version. The software will be downloaded
+   automatically from the Point One Navigation server (requires an internet connection).
+
+   For example, to update a device on `/dev/ttyUSBn` using LG69T-AM software version `A.B.C`, run the following:
+   ```
+   python3 firmware_tool.py --port=/dev/ttyUSBn --release lg69t-am-vA.B.C
+   ```
+
+
+### Updating Using A Downloaded `.p1fw` File
+
+To update the firmware on a device from a locally downloaded file, use the following steps:
+1. Download the latest `.p1fw` firmware file for your device from
+   [Point One's Developer Portal](https://pointonenav.com/docs/#standard_dev_kit).
+2. Determine the correct serial port name to communicate with UART1 on your device.
+   - In Windows, look for the COM port number of the "Standard COM Port" in Device Manager
+   - In Linux/Mac OS, run `ls -l /dev/ttyUSB*`
+3. Update the device, specifying the correct port and desired path to the downloaded `.p1fw` file.
+
+   For example, to update a device on `/dev/ttyUSBn` using LG69T-AM firmware version `A.B.C`, run the following:
+   ```
+   python3 firmware_tool.py --port=/dev/ttyUSBn /path/to/quectel-lg69t-am-A.B.C.p1fw
+   ```
+
+### Updating Only One Component
+
+If desired, you can use the `--type` argument to update just one component. For example, to update only the application
+software:
+```
+python3 firmware_tool.py --port=/dev/ttyUSBn --type=app lg69t-am-vA.B.C
+```
+
+### Updating Using `.bin` Files (Not Common)
+
+You can also update the firmware using `.bin` files if needed. This is not common for most applications. 
+
+```
+python3 firmware_tool.py --port=/dev/ttyUSBn --typ=app /path/to/quectel-lg69t-am-A.B.C_upg.bin
+```
+
+## Considerations
+
+By default, the update process will automatically reboot the device. If this is not working correctly, you may need to
+specify the `--manual-reboot` argument, and then power cycle the device manually when prompted.
+
+## Updating The Bootloader
+
+> Note: In general, you should never need to reprogram the bootloader. Doing so will completely erase the chip,
+> including any saved configuration, calibration, and the application firmware.
+
+To program the bootloader:
+1. Run `pip install stm32loader` to install the required programming tool.
+2. Turn the device off, or press and hold the `RESET` button. 
+3. Press and hold the `BOOT` button.
+4. Power on the module or release the `RESET` button.
+5. Release the `BOOT` button after the device is powered up.
+6. Run `stm32loader -p /dev/ttyUSBn -e -w -v -a 0x08000000 quectel-bootloader-X.Y.Z.bin`
+   - Specify the correct UART1 serial port for your machine.
+7. Press the `RESET` button to complete the process.
+8. Reload the application software as described in
+   [Updating Application and GNSS Firmware](#updating-application-and-gnss-firmware).
+   - After a bootloader change, you must specify `--manual-reboot` and restart the device manually when prompted.