starting with ESP-IDF

- initial ESP-IDF project
- starting custom component (Timber)

Signed-off-by: Peter Siegmund <peter@rdkr.com>

ePaper-ESP-IDF/main/main.cpp

@@ -0,0 +1,7 @@
+#include <stdio.h>
+#include "timber.h"
+
+extern "C" void app_main(void) {
+  Timber::plant(TreeESP32());
+  Timber::tag("ESP32Timber");
+}