enhance LVGL port to SSD1306

[dhebbeker]

The currently (7b84f5e) used way to write pixels is inefficient. As for each pixel the full display is re-written.

There are better approaches which would need adaptation:

• old version (based on LVGL v6?) of lv_drivers, which contains an SSD1306 driver port which has been abandoned.
• a port to ESP32 which depends on ESP32-IDF (see also 525c765); abstraction of I2C interface and/or adaptation to Arduino framework would be necessary

Some alternative starting point: 82f4bf1

Further resources:

• LVGL Forum: Are there any (generic) display drivers ports for SSD1306 using I2C?
• Our wiki: Display driver resources

💡 A successful port may be merged into lv_drivers