new wifi implementation + new screen drivers (#15)

Big Refactor + QR code on boot screen + fix for HA

- Refactor to make it easier to maintain long term
- Add QR code to the boot screen
- Fixed an issue that likely caused unreliable detection by the HA integration

Add encryption

Fix display sleep

New BLE format + LED control+ button

fix display init

Add 7.5" BWRY

General Improvements and Fixes

Direct write error handling (buffer overflow, timeout protection)
New BLE response codes for refresh status (0x73, 0x74)
Display power state management
Centralized cleanup function
BLE disconnect cleanup
Session recovery mechanisms
Enhanced logging

Name change + ESP deep sleep support (#6)

* Rename oeplnrf.json to nrf52840custom.json

* rename

* Delete variants/oeplnrf directory

* Update platformio.ini

* Update name + ESP deep sleep

* Update main.yaml

* Update release.yml

Lower NRF Power consumption