i18n: add bundle for idea/roots

idea/resources/messages/KotlinRootsBundle.properties

@@ -0,0 +1 @@
+description.text.update.source.roots.for.non.jvm.modules.in.kotlin.project=Update source roots for non-JVM modules in Kotlin project

idea/src/org/jetbrains/kotlin/idea/roots/KotlinNonJvmSourceRootConverterProvider.kt

@@ -218,7 +218,8 @@ class KotlinNonJvmSourceRootConverterProvider : ConverterProvider("kotlin-non-jv
         }
     }
 
-    override fun getConversionDescription() = "Update source roots for non-JVM modules in Kotlin project"
+    override fun getConversionDescription() =
+        KotlinRootsBundle.message("description.text.update.source.roots.for.non.jvm.modules.in.kotlin.project")
 
     override fun createConverter(context: ConversionContext) = ConverterImpl(context)
 }

idea/src/org/jetbrains/kotlin/idea/roots/KotlinRootsBundle.kt

@@ -0,0 +1,18 @@
+/*
+ * Copyright 2010-2020 JetBrains s.r.o. and Kotlin Programming Language contributors.
+ * Use of this source code is governed by the Apache 2.0 license that can be found in the license/LICENSE.txt file.
+ */
+
+package org.jetbrains.kotlin.idea.roots
+
+import org.jetbrains.annotations.NonNls
+import org.jetbrains.annotations.PropertyKey
+import org.jetbrains.kotlin.util.AbstractKotlinBundle
+
+@NonNls
+private const val BUNDLE = "messages.KotlinRootsBundle"
+
+object KotlinRootsBundle : AbstractKotlinBundle(BUNDLE) {
+    @JvmStatic
+    fun message(@PropertyKey(resourceBundle = BUNDLE) key: String, vararg params: Any): String = getMessage(key, *params)
+}