LVGL experimental mirroring of display on Web UI

[s-hadinger]

Description:

This features requires PSRAM

This features adds a button on the "Tools" page to dynamically load a Berry application that mirrors the LVGL display on the Web UI front page.

The button appears only if LVGL sucessfully started.

The LVGL mirrors in real-time what is displayed on the screen device. The Web UI is clickable, but for technical reasons, only short clicks are passed (no long clicks).

Checklist:

• The pull request is done against the latest development branch
• Only relevant files were touched
• Only one feature/fix was added per PR and the code change compiles without warnings
• The code change is tested and works with Tasmota core ESP8266 V.2.7.8
• The code change is tested and works with Tasmota core ESP32 V.3.1.1.250203
• I accept the CLA.

NOTE: The code change must pass CI tests. Your PR cannot be merged unless tests pass