Add support for LilyGo T-Impulse-Plus

[liamcottle]

This PR adds initial support for the LilyGo T-Impulse-Plus device.

• Schematic: https://github.com/Xinyuan-LilyGO/T-Impulse-Plus/blob/main/project/T-Impulse-Plus_V1.0.pdf
• Pin Out: https://github.com/Xinyuan-LilyGO/T-Impulse-Plus/blob/main/libraries/private_library/pin_config.h

It's very small and could be useful as a pendant/necklace tracker node, or an ultra light portable companion node.

• It has a GPS module
• It has a 200mAh battery
• It has a vibrator module (not implemented at this time)
• The TX/RX signal strength is decent with the built in spring antenna
• It has capacitive touch support on the top face, however currently disabled while screen not implemented
• It has 4MB of external QSPI flash, much improved over other devices with 1MB internal or 2MB external

I've not implemented display support, the screen is very small, and the default SSD1306 library would not init.
This can be done sometime in the future, as a UI redesign would be required anyway. Possibly based on @oltaco's PR #2517 for the LilyGo T-Echo Card.

I've tested Companion BLE firmware with the MeshCore App as well as the Repeater firmware.