Update Plugin Description for Latin-Character Requirement

[xterao]

During validation on IntelliJ IDEA Ultimate 2025.2 EAP (252.16512.17),
the description property check was strengthened (see JetBrains Plugin Verifier 1.385). It now enforces:
https://github.com/JetBrains/intellij-plugin-verifier/releases/tag/1.385

Invalid plugin descriptor 'description'. The plugin description must start with Latin characters and have at least 40 characters.

Update the README so that the plugin description begins with Latin letters and meets the minimum length requirement.