[SYS] esp32_platform: update to 55.03.39 (#2329)

* esp32_platform: update to 55.03.39

## Summary

- Add support for Python 3.14
- Improve ESP32 platform and framework compatibility.
- Update board support and toolchain integrations.
- Fix stability and hardware-specific issues across supported ESP32 targets.
- Release notes:
    - [55.03.39](https://github.com/pioarduino/platform-espressif32/releases/tag/55.03.39)
    - [55.03.38](https://github.com/pioarduino/platform-espressif32/releases/tag/55.03.38)
    - [55.03.37](https://github.com/pioarduino/platform-espressif32/releases/tag/55.03.37)
    - [55.03.36](https://github.com/pioarduino/platform-espressif32/releases/tag/55.03.36)
    - [55.03.35](https://github.com/pioarduino/platform-espressif32/releases/tag/55.03.35)
    - [55.03.34](https://github.com/pioarduino/platform-espressif32/releases/tag/55.03.34)

* update build to use python 3.14 with platformio 6.1.19

* Update esp32-arduino-lib-builder to v1.5

* [CI] Fix call8 link overflow on large Xtensa builds (IDF 5.5.4)

The 55.03.39 / IDF 5.5.4 bump enlarges the precompiled libs enough that
large Xtensa images (esp32 / esp32s3) overflow the call8 reach and fail to
link with "dangerous relocation: call8: call target out of range".
-mlongcalls (which makes calls linker-relaxable) is injected by
esp32-arduino-libs into the framework compile but NOT into lib_deps
(NimBLE-Arduino, ArduinoJson) or project sources.

Add a project pre: extra_script (scripts/add_mlongcalls.py) that applies
-mlongcalls to CCFLAGS/ASFLAGS, gated on the Xtensa MCUs (RISC-V c3 has no
call8 and rejects the flag). Wired into [env]; the four esp32dev-*pilight*
envs that set their own extra_scripts list it explicitly too, since
PlatformIO replaces rather than merges extra_scripts.

Also bump esp32-arduino-libs 0.1.5 -> 0.1.6, which restores the
framework-side -mdisable-hardware-atomics / -fno-builtin-* flags that 0.1.5
dropped under IDF 5.5.4 (separate from the lib_deps call8 issue).

Verified clean (0 call8): esp32dev-all-test, esp32dev-ble, theengs-bridge,
theengs-plug, esp32dev-pilight (+cc1101); esp32c3 unaffected.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

---------

Co-authored-by: Florian <florian@theengs.io>
Co-authored-by: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

platformio.ini

@@ -176,11 +176,12 @@ build_flags =
 ;  -E ; generate precompiled source file (.pio/build/*/src/main.ino.cpp.o), use for precompilator debuging only (prevent compilation to succeed)
 ;  '-DLOG_LEVEL=LOG_LEVEL_TRACE'  ; Enable trace level logging
 monitor_speed = 115200
+extra_scripts = pre:scripts/add_mlongcalls.py
 
 [com]
 esp8266_platform = espressif8266@4.2.1
-esp32_platform =  https://github.com/pioarduino/platform-espressif32/releases/download/55.03.33/platform-espressif32.zip
-esp32_platform_packages = framework-arduinoespressif32-libs @ https://github.com/theengs/esp32-arduino-lib-builder/releases/download/0.1.4/esp32-arduino-libs.tar.gz
+esp32_platform =  https://github.com/pioarduino/platform-espressif32/releases/download/55.03.39/platform-espressif32.zip
+esp32_platform_packages = framework-arduinoespressif32-libs @ https://github.com/theengs/esp32-arduino-lib-builder/releases/download/0.1.6/esp32-arduino-libs.tar.gz
 esp32_solo_platform = https://github.com/tasmota/platform-espressif32/releases/download/2023.02.00/platform-espressif32.zip
 atmelavr_platform = atmelavr@3.3.0