KT-33384 Intention to switch between single-line/multi-line lambda (#2790)

Add intention for single-line lambda <-> multi-line lambda conversion

#KT-33384 Fixed

idea/testData/intentions/convertLambdaToSingleLine/.intention

@@ -0,0 +1 @@
+org.jetbrains.kotlin.idea.intentions.ConvertLambdaToSingleLineIntention

idea/testData/intentions/convertLambdaToSingleLine/hasEolComment.kt

@@ -0,0 +1,7 @@
+// IS_APPLICABLE: false
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { item ->
+        println(item) // comment
+    }<caret>
+}

idea/testData/intentions/convertLambdaToSingleLine/multiLineBody.kt

@@ -0,0 +1,8 @@
+// IS_APPLICABLE: false
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { item ->
+        println(item)
+        println(item)
+    }<caret>
+}

idea/testData/intentions/convertLambdaToSingleLine/multiLineBody2.kt

@@ -0,0 +1,10 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { item ->
+
+
+        println(item) /* comment */
+
+
+    }<caret>
+}

idea/testData/intentions/convertLambdaToSingleLine/multiLineBody2.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { item -> println(item) /* comment */ }
+}

idea/testData/intentions/convertLambdaToSingleLine/multiLineBody3.kt

@@ -0,0 +1,7 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach {
+            item ->
+        println(item)
+    }<caret>
+}

idea/testData/intentions/convertLambdaToSingleLine/multiLineBody3.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { item -> println(item) }
+}

idea/testData/intentions/convertLambdaToSingleLine/simple.kt

@@ -0,0 +1,5 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach <caret>{
+    }
+}

idea/testData/intentions/convertLambdaToSingleLine/simple.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { }
+}

idea/testData/intentions/convertLambdaToSingleLine/simple2.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach {
+        <caret>println(it)
+    }
+}

idea/testData/intentions/convertLambdaToSingleLine/simple2.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { println(it) }
+}

idea/testData/intentions/convertLambdaToSingleLine/simple3.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { item ->
+        println(item)<caret>
+    }
+}

idea/testData/intentions/convertLambdaToSingleLine/simple3.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { item -> println(item) }
+}

idea/testData/intentions/convertLambdaToSingleLine/simple4.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { item ->
+        println(item); println(item); println(item) /* comment */
+    }<caret>
+}

idea/testData/intentions/convertLambdaToSingleLine/simple4.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { item -> println(item); println(item); println(item) /* comment */ }
+}

idea/testData/intentions/convertLambdaToSingleLine/simple5.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEachIndexed { index, s ->
+        println(index)
+    }<caret>
+}

idea/testData/intentions/convertLambdaToSingleLine/simple5.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEachIndexed { index, s -> println(index) }
+}

idea/testData/intentions/convertLambdaToSingleLine/simple6.kt

@@ -0,0 +1,6 @@
+// WITH_RUNTIME
+fun test(list: List<Pair<String, Int>>) {
+    list.forEach { (s, _) ->
+        println(s)
+    }<caret>
+}

idea/testData/intentions/convertLambdaToSingleLine/simple6.kt.after

@@ -0,0 +1,4 @@
+// WITH_RUNTIME
+fun test(list: List<Pair<String, Int>>) {
+    list.forEach { (s, _) -> println(s) }
+}

idea/testData/intentions/convertLambdaToSingleLine/singleLine.kt

@@ -0,0 +1,5 @@
+// IS_APPLICABLE: false
+// WITH_RUNTIME
+fun test(list: List<String>) {
+    list.forEach { println(it) }
+}<caret>