Implement Missing Documentation Inspection

#KT-1494 Fixed

idea/testData/kdoc/highlighting/MissingDocumentation.kt

@@ -0,0 +1,69 @@
+
+public fun <warning descr="Missing documentation">publicUndocumentedFun</warning>() {}
+fun <warning descr="Missing documentation">defaultUndocumentedFun</warning>() {}
+
+/** Some documentation */
+public fun publicDocumentedFun() {}
+
+/** Some documentation */
+fun defaultDocumentedFun() {}
+
+private fun privateUndocumentedFun() {}
+internal fun internalUndocumentedFun() {}
+
+
+
+public class <warning descr="Missing documentation">publicUndocumentedClass</warning>() {}
+class <warning descr="Missing documentation">defaultUndocumentedClass</warning>() {}
+
+/** Some documentation */
+public class publicDocumentedClass() {}
+
+/** Some documentation */
+class defaultDocumentedClass() {}
+
+private class privateUndocumentedClass() {}
+internal class internalUndocumentedClass() {}
+
+
+
+private open class Properties {
+
+    public open val <warning descr="Missing documentation">publicUndocumentedProperty</warning>: Int = 0
+    open val <warning descr="Missing documentation">defaultUndocumentedProperty</warning>: Int = 0
+
+    /** Some documentation */
+    public open val publicDocumentedProperty: Int = 0
+
+    /** Some documentation */
+    open val defaultDocumentedProperty: Int = 0
+
+    private val privateUndocumentedProperty: Int = 0
+    internal open val internalUndocumentedProperty: Int = 0
+
+
+    protected open val protectedUndocumentedProperty: Int = 0
+    protected class protectedUndocumentedClass {}
+    protected fun protectedUndocumentedFun() {}
+
+    /** Some documentation */
+    protected open val protectedDocumentedProperty: Int = 0
+}
+
+private open class ChildClass : Properties() {
+    override val <warning descr="Missing documentation">publicUndocumentedProperty</warning>: Int = 4
+    override val <warning descr="Missing documentation">defaultUndocumentedProperty</warning>: Int = 4
+    override val publicDocumentedProperty: Int = 4
+    override val defaultDocumentedProperty: Int = 4
+
+    /** Some documentation */
+    override public val internalUndocumentedProperty: Int = 4
+    override public val <warning descr="Missing documentation">protectedUndocumentedProperty</warning>: Int = 4
+    override public val protectedDocumentedProperty: Int = 4
+}
+
+private class GrandChildClass : ChildClass() {
+    override public val internalUndocumentedProperty: Int = 6
+}
+
+// NO_CHECK_INFOS