fix: add list newline handling and resolve multiple test TODOs across compiler and test suite

- Add TOKEN_LINE matching after list elements in compiler to allow newlines before commas or closing brackets
- Add tests for list newline handling, EOF after comma/element, and class name inside body
- Remove resolved TODOs for default constructors, inherited fields, metaclass is checks, zero comparison, and bitwise not behavior

test/is.wren

@@ -20,6 +20,13 @@ io.write((fn 1) is Object) // expect: true
 io.write("s" is Object) // expect: true
 io.write(123 is Object) // expect: true
 
+// Classes extend Class.
+io.write(Num is Class) // expect: true
+io.write(null is Class) // expect: false
+io.write(true is Class) // expect: false
+io.write((fn 1) is Class) // expect: false
+io.write("s" is Class) // expect: false
+io.write(123 is Class) // expect: false
+
 // TODO: Non-class on RHS.
 // TODO: Precedence and associativity.
-// TODO: Metaclasses ("Num is Class").