Raspbery Pi quality of life improvements
Normal shortcuts in Nano
Update nano editor shortcuts to mimic mac and windows
Power button
This is a nice guide that explains everything you need to do, and has a convenient little installer
If using a very early release of raspberry pi 4 you may need to update the bootloader. Otherwise, double and triple check your wiring and pin usage is correct. Refer to the Raspberry Pi pinout
Power LED
It's super simple! See this guide
PWM Fan control
(TODO) https://blog.driftking.tw/en/2019/11/Using-Raspberry-Pi-to-Control-a-PWM-Fan-and-Monitor-its-Speed/#Control-Script