Support custom accessors for top-level properties in scripts.

compiler/testData/diagnostics/tests/script/topLevelPropertiesWithGetSet.kts

@@ -0,0 +1,39 @@
+val testVal: Int get() = 42
+
+val testValNoType get() = 42
+
+val String.testExtVal: Int get() = 42
+
+val String.testExtValNoType get() = 42
+
+var testVar: Int get() = 42; set(value) {}
+
+var String.testExtVar: Int get() = 42; set(value) {}
+
+val testValLineBreak: Int
+get() = 42
+
+val testValLineBreakNoType
+get() = 42
+
+<!MUST_BE_INITIALIZED_OR_BE_ABSTRACT!>val testValLineBreakSemi: Int<!>;
+<!UNRESOLVED_REFERENCE!>get<!>() = 42
+
+<!MUST_BE_INITIALIZED_OR_BE_ABSTRACT!>val testValLineBreakSemiNoType<!>;
+<!UNRESOLVED_REFERENCE!>get<!>() = 42
+
+var testVarLineBreak: Int
+get() = 42
+set(value) {}
+
+var String.testExtVarLineBreak: Int
+get() = 42
+set(value) {}
+
+<!MUST_BE_INITIALIZED_OR_BE_ABSTRACT!>var testVarLineBreakSemi: Int<!>;
+<!UNRESOLVED_REFERENCE!>get<!>() = 42
+<!UNRESOLVED_REFERENCE!>set<!>(<!UNRESOLVED_REFERENCE!>value<!>) {}
+
+<!MUST_BE_INITIALIZED_OR_BE_ABSTRACT!>var String.testExtVarLineBreakSemi: Int<!>;
+<!UNRESOLVED_REFERENCE!>get<!>() = 42
+<!UNRESOLVED_REFERENCE!>set<!>(<!UNRESOLVED_REFERENCE!>value<!>) {}