Implement an intention action to move a companion object member to top level

#KT-18828 Fixed

(cherry picked from commit 11f8f8b)

idea/testData/intentions/moveMemberToTopLevel/.intention

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

idea/testData/intentions/moveMemberToTopLevel/abstractFunction.kt

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+// IS_APPLICABLE: false
+
+abstract class A {
+    abstract fun <caret> foo()
+}

idea/testData/intentions/moveMemberToTopLevel/abstractProperty.kt

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+// IS_APPLICABLE: false
+
+abstract class A {
+    abstract val <caret> foo: Int
+}

idea/testData/intentions/moveMemberToTopLevel/function.kt

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+// WITH_RUNTIME
+
+object A {
+    private fun <caret>foo() = 1
+}

idea/testData/intentions/moveMemberToTopLevel/function.kt.after

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+// WITH_RUNTIME
+
+private fun foo() = 1

idea/testData/intentions/moveMemberToTopLevel/functionInCompanion.kt

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+// WITH_RUNTIME
+
+class A {
+    companion object {
+        private fun <caret>foo() = 1
+    }
+}

idea/testData/intentions/moveMemberToTopLevel/functionInCompanion.kt.after

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+// WITH_RUNTIME
+
+class A {
+}
+
+private fun foo() = 1

idea/testData/intentions/moveMemberToTopLevel/property.kt

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+// WITH_RUNTIME
+
+object A {
+    val <caret>foo: Int = 1
+}

idea/testData/intentions/moveMemberToTopLevel/property.kt.after

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+// WITH_RUNTIME
+
+val foo: Int = 1

idea/testData/intentions/moveMemberToTopLevel/propertyInCompanion.kt

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+// WITH_RUNTIME
+
+class A {
+    companion object {
+        val <caret>foo: Int = 1
+    }
+}

idea/testData/intentions/moveMemberToTopLevel/propertyInCompanion.kt.after

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+// WITH_RUNTIME
+
+class A {
+}
+
+val foo: Int = 1

idea/testData/intentions/moveMemberToTopLevel/redeclarationConflict.kt

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+// SHOULD_FAIL_WITH: Package 'default' already contains function f1(Int)
+object Test {
+    fun <caret>f1(n: Int) {}
+}
+
+fun f1(n: Int) {}

idea/testData/intentions/moveMemberToTopLevel/redeclarationConflictWithPackage.kt

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+// SHOULD_FAIL_WITH: Package 'foo.bar' already contains function f1(Int)
+package foo.bar
+
+object Test {
+    fun <caret>f1(n: Int) {}
+}
+
+fun f1(n: Int) {}

idea/testData/intentions/moveMemberToTopLevel/redeclarationPropertyConflict.kt

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+// SHOULD_FAIL_WITH: Package 'default' already contains property f1
+object Test {
+    val <caret>f1 = 1
+}
+
+val f1 = 1