Doc update: added note about global arduino component (#7277)

* Doc update: added note about global arduino component

* Requested changne IDF -> ESP-IDF

Author: PilnyTomas

Diff for: docs/source/esp-idf_component.rst

@@ -37,6 +37,8 @@ Installation
     cd ../.. && \
     idf.py menuconfig
 
+.. note:: If you use Arduino with ESP-IDF often, you can place the arduino folder into global components folder.
+
 Configuration
 -------------