Fix multi-line comments for cpp enums (#5345) (#5346)

- fix CSharp comments generation
- fix Python comments generation
- fix Lua comments generation
- fix PHP comments generation
- fix Dart comments generation
- add brief description of Color enum
- add multi-line comments to the Monster:Color

tests/MyGame/Example/Any.cs

@@ -7,10 +7,10 @@ namespace MyGame.Example
 
 public enum Any : byte
 {
- NONE = 0,
- Monster = 1,
- TestSimpleTableWithEnum = 2,
- MyGame_Example2_Monster = 3,
+  NONE = 0,
+  Monster = 1,
+  TestSimpleTableWithEnum = 2,
+  MyGame_Example2_Monster = 3,
 };