Introduce "Add remaining when branches" intention #KT-23306 Fixed

idea/testData/intentions/addWhenRemainingBranches/.intention

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

idea/testData/intentions/addWhenRemainingBranches/noElse.kt

@@ -0,0 +1,11 @@
+// IS_APPLICABLE: false
+
+enum class Entry {
+    FOO, BAR, BAZ
+}
+
+fun test(e: Entry) {
+    <caret>when (e) {
+        Entry.FOO -> {}
+    }
+}

idea/testData/intentions/addWhenRemainingBranches/noRemainingBranches.kt

@@ -0,0 +1,13 @@
+// IS_APPLICABLE: false
+
+enum class Entry {
+    FOO, BAR, BAZ
+}
+
+fun test(e: Entry) {
+    <caret>when (e) {
+        Entry.FOO -> {}
+        Entry.BAR -> {}
+        Entry.BAZ -> {}
+    }
+}

idea/testData/intentions/addWhenRemainingBranches/simple.kt

@@ -0,0 +1,12 @@
+// WITH_RUNTIME
+
+enum class Entry {
+    FOO, BAR, BAZ
+}
+
+fun test(e: Entry) {
+    <caret>when (e) {
+        Entry.FOO -> {}
+        else -> {}
+    }
+}

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

@@ -0,0 +1,14 @@
+// WITH_RUNTIME
+
+enum class Entry {
+    FOO, BAR, BAZ
+}
+
+fun test(e: Entry) {
+    <caret>when (e) {
+        Entry.FOO -> {}
+        Entry.BAR -> TODO()
+        Entry.BAZ -> TODO()
+        else -> {}
+    }
+}