arduino-esp32 2.0.x support

[atanisoft]

Arduino-esp32 2.0.0 support:

• [x] OSSelectWakeup.
  • [x] Unify v3.x and v4.x esp_start_select, esp_wakeup, esp_wakeup_from_isr.
• [x] Esp32WiFiManager.
  • [x] Migrate to new event mechanism for v4.x+ to resolve deprecated warnings.
• [x] CAN
  • [x] Restrict to ESP32 only.
  • [x] Mark as deprecated with IDF v4.3+
  • [x] Add compatibility layer for IDF v4.3 (migration support only)
• [x] TWAI
  • [x] Async API
  • [x] select() API
• [x] ESP32-S2 support.
  • [x] TWAI (IDF v4.4 or later)
  • [x] WiFi
• [x] ESP32-C3 support.
  • [x] TWAI (~920/sec via load_test -d /dev/ttyACM0 -s 1500 with LCC-Buffer on /dev/ttyACM0)
  • [x] WiFi
• [x] Esp32GPIO using ESP-IDF APIs
• [x] CpuLoad adjustments for ESP32 single core.
• [x] WS2812 RMT adapter (includes Gpio wrapper for individual LEDs)
• [x] Firmware upload over TWAI.