feat: use special scope for Action coroutine

It's said that this allows idea to control the action cancellation
https://plugins.jetbrains.com/docs/intellij/launching-coroutines.html#using-currentthreadcoroutinescope
IO is moved inside to have less code under it

Author: AleksandrSl

src/main/kotlin/com/github/aleksandrsl/intellijluau/actions/LuauExternalFormatAction.kt

@@ -2,7 +2,6 @@ package com.github.aleksandrsl.intellijluau.actions
 
 import com.github.aleksandrsl.intellijluau.LuauNotifications
 import com.github.aleksandrsl.intellijluau.settings.ProjectSettingsState
-import com.github.aleksandrsl.intellijluau.tools.LuauCliService
 import com.github.aleksandrsl.intellijluau.tools.StyLuaCli
 import com.github.aleksandrsl.intellijluau.tools.ToolchainResolver
 import com.intellij.notification.NotificationType
@@ -11,6 +10,7 @@ import com.intellij.openapi.actionSystem.AnAction
 import com.intellij.openapi.actionSystem.AnActionEvent
 import com.intellij.openapi.application.EDT
 import com.intellij.openapi.diagnostic.logger
+import com.intellij.openapi.progress.currentThreadCoroutineScope
 import com.intellij.openapi.project.Project
 import com.intellij.platform.ide.progress.withBackgroundProgress
 import kotlinx.coroutines.Dispatchers
@@ -38,13 +38,14 @@ class LuauExternalFormatAction : AnAction() {
     override fun actionPerformed(event: AnActionEvent) {
         val project: Project = event.project ?: return
 
-        val projectService = LuauCliService.getInstance(project)
         val notificationGroupManager = LuauNotifications.pluginNotifications()
-        projectService.coroutineScope.launch(Dispatchers.IO) {
+        currentThreadCoroutineScope().launch {
             // Why isn't modal progress working?
             // Do I need different contexts here?
             withBackgroundProgress(project, "Stylua format current document") {
-                val result = ToolchainResolver.resolveStylua(project)?.formatDocument(project)
+                val result = withContext(Dispatchers.IO) {
+                    ToolchainResolver.resolveStylua(project)?.formatDocument(project)
+                }
                 withContext(Dispatchers.EDT) {
                     when (result) {
                         is StyLuaCli.FormatResult.Success -> notificationGroupManager.createNotification(