Remake the use of `Spell Checking` to extension point

[Danil42Russia]

modulite/src/main/kotlin/com/vk/modulite/ModuliteStartupActivity.kt

Line 12 in 36b7c72

private fun setupWordsForSpellChecker(project: Project) {

Start using com.intellij.spellchecker.support extension point. Docs: https://plugins.jetbrains.com/docs/intellij/spell-checking.html