Compilation errors and deprecation warnings with ESP32, ArduinoJson, and LEDC API (PlatformIO, Arduino core 2.x.x+)

[printryde]

Hello!
I am facing several compilation errors and deprecation warnings when building my project for ESP32 using PlatformIO and the latest Arduino/ESP32/ArduinoJson libraries. Here are the details:

1. ArduinoJson Deprecation Warnings
   I get warnings like:
   warning: 'DynamicJsonDocument' is deprecated: use JsonDocument instead [-Wdeprecated-declarations] DynamicJsonDocument wifiDoc(256);
   and
   warning: 'StaticJsonDocument' is deprecated: use JsonDocument instead [-Wdeprecated-declarations] StaticJsonDocument<256> jsonCmdReceive;
   But when I try to use JsonDocument directly, I get an error:
   no instance of constructor "ArduinoJson::V741PB22::JsonDocument::JsonDocument" matches the argument list
   So, it is unclear how to migrate to the new API without breaking the code.
2. LEDC API Errors
   I get errors like:
   'ledcAttach' was not declared in this scope
   and
   'suggested alternative: ledcAttachPin'
   when using:
   ledcAttach(PWMA, freq, ANALOG_WRITE_BITS);.
   It seems that the LEDC API has changed between Arduino ESP32 core 2.x.x and 3.x.x, and the documentation is not always clear which version supports which function.
3. ESP-NOW API Error
   I get this error:
   'esp_now_recv_info_t' does not name a type; did you mean 'esp_now_peer_info_t'? void OnDataRecv(const esp_now_recv_info_t *info, const unsigned char* incomingData, int len)
   It looks like the type esp_now_recv_info_t does not exist in the current ESP32 Arduino core.
4. General Deprecation Warnings
   I also see warnings like:
   'bool ArduinoJson::V741PB22::JsonDocument::containsKey(TChar*) const' is deprecated: use doc["key"].is<T>() instead.
   and
   control reaches end of non-void function [-Wreturn-type]
   Environment:
   PlatformIO (latest)
   ESP32 Arduino core 2.x.x
   ArduinoJson 7.x.x
   Windows 10
   Questions:
   What is the correct way to migrate to the new JsonDocument API for both static and dynamic documents?
   What is the recommended way to write cross-version compatible code for LEDC (PWM) initialization?
   What is the correct function signature for ESP-NOW receive callback in the latest ESP32 Arduino core?
   Are there any migration guides or best practices for handling these deprecations and API changes?
   Thank you for your help!