Changelog

[Unreleased]

Document pending work after recent restructuring.
Move platform ports and HAL support modules into top-level port/ and support/ directories with dedicated include/src separation.
Relocate the PTN5110 driver sources and headers to third_party/nxp_pd/ to clearly separate inherited NXP code from STLINE additions.

Reorganized sources under src/ with matching public headers in include/.
Added FreeRTOS-based port layers for ESP32-S3 and STM32 platforms plus Arduino cooperative loop support.
Imported PTN5110 HAL and policy engine from the original NXP stack.