check_library_structure: Note implications of stray sketches for Web Editor in error messages

Unlike the Arduino IDE, the Arduino Web Editor requires that all sketches bundled with a library be under the examples folder. If a library contains a sketch anywhere else, it can not be imported in the Arduino Web Editor. The sketches outside the examples folder will not be accessible as examples for the pre-installed libraries of the Library Manager index. I already have checks for stray sketches and misspelled examples folder name in check_library_structure, but their error messages didn't previously note the more serious implications of this for Arduino Web Editor.

Author: per1234

arduino-ci-script.sh

@@ -1440,7 +1440,7 @@ function check_library_structure() {
 
     # Check for incorrect spelling of examples folder
     if [[ $(find "$normalizedLibraryPath" -maxdepth 1 -type d -and -iregex '^.*/examples?$') && ! $(find "$normalizedLibraryPath" -maxdepth 1 -type d -and -name 'examples') ]]; then
-      echo "ERROR: ${normalizedLibraryPath}: Incorrect examples folder name. It should be spelled exactly \"examples\". See: https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5:-Library-specification#library-examples"
+      echo "ERROR: ${normalizedLibraryPath}: Incorrect examples folder name. It should be spelled exactly \"examples\". Incorrect examples folder name will cause importing the library to Arduino Web Editor to fail and examples to not be available in Arduino Web Editor for Library Manager libraries. See: https://github.com/arduino/Arduino/wiki/Arduino-IDE-1.5:-Library-specification#library-examples"
       exitStatus=$(set_exit_status "$exitStatus" $ARDUINO_CI_SCRIPT_CHECK_LIBRARY_STRUCTURE_INCORRECT_EXAMPLES_FOLDER_NAME_EXIT_STATUS)
     fi
 
@@ -1488,7 +1488,7 @@ function check_library_structure() {
 
     # Check for sketch files outside of the src or extras folders
     if [[ $(find "$normalizedLibraryPath" -maxdepth 1 -path './examples' -prune -or -path './extras' -prune -or \( -type f -and \( -iname '*.ino' -or -iname '*.pde' \) \)) ]]; then
-      echo "ERROR: ${normalizedLibraryPath}: Sketch files found outside the examples and extras folders."
+      echo "ERROR: ${normalizedLibraryPath}: Sketch files found outside the examples and extras folders. Sketches outside the examples folder will cause importing the library to Arduino Web Editor to fail."
       exitStatus=$(set_exit_status "$exitStatus" $ARDUINO_CI_SCRIPT_CHECK_LIBRARY_STRUCTURE_STRAY_SKETCH_EXIT_STATUS)
     fi