Add settings panel for configuring Roborazzi tasks explanation

[sanao1006]

Fixed #493

• Note on roborazzi task has been added to Roborazzi settings window.
• Add the explanation in README

[sanao1006]

@takahirom

Please review again as I have corrected it!

Also, added automatic line break feature since the text is a little longer.

https://github.com/user-attachments/assets/a9d20e43-1f6c-43cc-8fb5-2f6a97f9c354