Move EditorConfig comment to separate line

[jp7677]

From https://editorconfig.org/#file-format-details "Comments should go on their own lines."

As a side effect, this prevents an exception in the IntelliJ Ktlint extension which otherwise interprets 120 as a string.
Granted, the extension itself should handle this more elegantly...

[jp7677]

PS: If you wanna actually use ktlint, we should increase the max-line to 140 and add the following to the editor-config

[*.{kt,kts}]
# noinspection EditorConfigKeyCorrectness
disabled_rules = multiline-if-else
# noinspection EditorConfigKeyCorrectness
disabled_rules = no-wildcard-imports

Ktlint still has a few smaller complaints after applying this, but all can be auto corrected by ktlint (e.g. with ./gradlew ktlintFormat when adding id("org.jlleitschuh.gradle.ktlint") version "11.0.0" as a ktlint gradle plugin).