Support custom accessors for top-level properties in scripts.

compiler/testData/psi/script/topLevelPropertiesWithGetSet.kts

@@ -0,0 +1,54 @@
+val testVal: Int get() = 42
+
+val testValSemiSameLine: 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
+
+val testValLineBreakSemi: Int;
+    get() = 42
+
+val testValLineBreakSemiComment1: Int; // this IS NOT an accessor:
+    get() = 42
+
+val testValLineBreakSemiComment2: Int; /*
+this IS NOT an accessor either:
+*/
+    get() = 42
+
+val testValLineBreakSemiComment3: Int; /*
+this IS an accessor!
+*/ get() = 42
+
+val testValLineBreakSemiNoType;
+    get() = 42
+
+var testVarLineBreak: Int
+    get() = 42
+    set(value) {}
+
+var String.testExtVarLineBreak: Int
+    get() = 42
+    set(value) {}
+
+var testVarLineBreakSemi: Int;
+    get() = 42
+    set(value) {}
+
+var String.testExtVarLineBreakSemi: Int;
+    get() = 42
+    set(value) {}
+