Pocketed Heltec V3 OLED LoRa Case

This is a form fit snap fit case for the Heltec OLED LoRa V3 Board, and includes space for a battery, USB access, SMA antenna, and one or two small sensors (e.g. GPS module).

This model is very tight and was tweaked to fit a specific [3000mAh battery](https://amzn.to/3RRdAaz) and the [Heltec OLED LoRa V3 Board](https://amzn.to/45mC8LC). Space is available for a [BN-180 GPS](https://www.amazon.com/DIYmalls-Glonass-Raspberry-Aircraft-Betaflight/dp/B086ZKWYP5/132-5143288-8538736?psc=1) or other small sensors. The case is a snap fit, but there needs to be some attention paid to the location of battery, antenna, and sensor leads so that they are not in the way.

Modifications from source:
* The case has been lengthened by 8.1mm
* A pocket to hold small sensors has been introduced
* The hole for the SMA jack has been slightly widened for easier fit
* The hole for the SMA jack can receive a 5/16" nut to make tightening easier
* The buttons have been slightly resized for more cleara