starting with ESP-IDF

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

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

ePaper-ESP-IDF/components/timber/include/tree_esp32.h

@@ -0,0 +1,7 @@
+#pragma once
+#include "tree.h"
+
+class TreeESP32 : public Tree {
+ public:
+  ~TreeESP32();
+};