Update IJ platform and kotlin

[overpas]

PR-Codex overview

This PR updates the version numbers for kotlin and intellij-platform in the gradle/libs.versions.toml file to newer releases, ensuring the project uses the latest features and fixes.

Detailed summary

• Updated kotlin version from 2.1.0 to 2.1.20
• Updated intellij-platform version from 2.2.1 to 2.5.0

✨ Ask PR-Codex anything about this PR by commenting with /codex {your question}