Update Readme

Author: mobizt

README.md

@@ -28,6 +28,9 @@ With new IMAP parser, the library reliability has been improved while providing
 
 This `ESP-Mail-Client` library will be deprecated after the release of [ReadyMail](https://github.com/mobizt/ReadyMail) library within a year.
 
+<details>
+<summary>Click here for library documentation.</summary>
+
 ## Table of Contents
 
 
@@ -1066,30 +1069,7 @@ void smtpCallback(SMTP_Status status)
 ```
 
 
-## Sponsors
-
-Sponsors via [Github sponsors](https://github.com/sponsors/mobizt).
-
-Current sponsors
-
-
-<a href="https://github.com/Jagakatt"><img src="https://github.com/Jagakatt.png" width="30" height="30" alt="@Jagakatt"></a>
-<a href="#sponsors"><img src="https://avatars.githubusercontent.com/u/166620797?s=35&v=4" width="30" height="30" alt="private sponsor"></a>
-
-Past sponsors
-
-<img src="https://avatars.githubusercontent.com/u/5763108?s=60&amp;v=4" width="30" height="30" alt="past_sponsor"> <img src="https://avatars.githubusercontent.com/u/57544850?s=60&amp;v=4" width="30" height="30" alt="past_sponsor"> <img src="https://avatars.githubusercontent.com/u/63749581?s=60&amp;v=4" width="30" height="30" alt="past_sponsor"> <img src="https://avatars.githubusercontent.com/u/83292822?s=60&amp;v=4" width="30" height="30" alt="past_sponsor"> <img src="https://avatars.githubusercontent.com/u/31892707?s=60&amp;v=4" width="30" height="30" alt="past_sponsor"> <img src="https://avatars.githubusercontent.com/u/96478986?s=60&amp;v=4" width="30" height="30" alt="past_sponsor"> <a href="https://github.com/siz0001"><img src="https://avatars.githubusercontent.com/u/42665078?s=60&v=4" width="30" height="30" alt="@siz0001"></a>
-
-### Buy Me a Coffee
-
-Donors via [Buy Me a Coffee](https://www.buymeacoffee.com/Mobizt).
-
-Giulio, Stepinside, Liew Wuttipat, Keith Le Breton, Etan Hayik, Nikolaj Nøhr-Rasmussen, bjdshp, Francis Hsueh, tjozsef, dkalliv, Allan Green, Forrest Milner, Someone, @Engine1992, Vasanth, Jason Duhamell and Yochaing.
-
-If you like my works, you can give a star. If you can make benefit from my project or love it, you can sponsoring me or [Buy Me a Coffee](https://www.buymeacoffee.com/Mobizt).
-
-
-
+</details>
 
 ## License