misc: add arduino sketch path to config

- this change also fixes the 'platformio_example' path

Author: sleepdefic1t

library.json

@@ -62,8 +62,9 @@
     ]
   },
   "examples": [
-    "[Ee]xamples/platformio_example/*.ino",
-    "[Ee]xamples/platformio_example/*.cpp",
-    "[Ee]xamples/platformio_example/*.c"
+    "[Ee]xamples/arduino/*/*.ino",
+    "[Ee]xamples/platformio_example/*/*.ino",
+    "[Ee]xamples/platformio_example/*/*.cpp",
+    "[Ee]xamples/platformio_example/*/*.c"
   ]
 }