How to given power for nRF8002 chip?
If you don't want to use a Development Kit you will need to design your custom PCB for that IC.

To power the IC you will need connect all power pins as said the datasheet:



Where VDD is the Power (1.9 - 3-6V) and the VSS is the Ground (0V).

The recommend voltage to this IC is 3.3V, and have a lot of switch power supplys designs for this voltage, you can use this tool to create your own, with BOM, schematic and PCB if you want.

If you do not care to use exactly this IC you could simple use some Bluetooth Module with some simple MCU like an Arduino.