Wireless N64 Controller v0.4

Noteworthy changes in this version include:

Hardware

• Using ESP32 Lolin32 lite board (built-in LiPo power conversion, replacing the more common devkit v1-style board)
• PCB revamp - supporting new ESP32 board plus updated pin usage

Software

• Analog stick calibration
• Framework for "soft" buttons - useful for emulators, when you want to have dedicated menu, pause, save, etc.
• Framework for battery level measurement

Documentation

• Initial build instructions