KT-4568: Created the ConvertNegatedBooleanSequence intention. This intention takes an expression of the form !a &&,|| !b &&,|| ... and converts it to the DeMorgan equivalent !(a &&,|| b ...).

idea/testData/intentions/convertNegatedBooleanSequence/negatedFunction.kt

@@ -0,0 +1,11 @@
+fun bar1() {
+    return true
+}
+
+fun bar2() {
+    return false
+}
+
+fun foo() {
+    return <caret>!bar1() && !bar2()
+}