Intentions: Implement 'Add val/var to primary constructor parameter' intention

#KT-4038 In Progress

idea/testData/intentions/addValOrVar/.intention

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+org.jetbrains.kotlin.idea.intentions.AddValVarToConstructorParameterIntention

idea/testData/intentions/addValOrVar/addVal.kt

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+class Foo(<caret>x: Int, y: Int) {
+
+}

idea/testData/intentions/addValOrVar/addVal.kt.after

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+class Foo(val<caret> x: Int, y: Int) {
+
+}

idea/testData/intentions/addValOrVar/funParameter.kt

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+// IS_APPLICABLE: false
+fun foo(<caret>x: Int, y: Int) {
+
+}

idea/testData/intentions/addValOrVar/hasVal.kt

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+// IS_APPLICABLE: false
+class Foo(val <caret>x: Int, y: Int) {
+
+}

idea/testData/intentions/addValOrVar/hasVar.kt

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+// IS_APPLICABLE: false
+class Foo(var <caret>x: Int, y: Int) {
+
+}

idea/testData/intentions/addValOrVar/outOfRange.kt

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+// IS_APPLICABLE: false
+class Foo(x: <caret>Int, y: Int) {
+
+}

idea/testData/intentions/addValOrVar/secondaryConstructorParameter.kt

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+// IS_APPLICABLE: false
+class Foo {
+    constructor(<caret>x: Int, y: Int)
+}