Increase the compilation speed (#3545)

- Remove toStringConversion function and move json_helper include out of numericalproperty.inl
  - Optimizing some header files
  - Remove duplicate Lua functions from properties. 
  - Move List,Option,Selection,String, and TriggerProperty into misc folder
  - Move lua_helper include out of inline file
  - Add lua_helper to the precompiled header
  - Declare property functions as final. No longer have OptionProperty derive from IntProperty
  - Remove Dictionary header from properties

include/openspace/scripting/lualibrary.h

@@ -25,11 +25,12 @@
 #ifndef __OPENSPACE_CORE___LUALIBRARY___H__
 #define __OPENSPACE_CORE___LUALIBRARY___H__
 
-#include <ghoul/lua/ghoul_lua.h>
 #include <filesystem>
 #include <string>
 #include <vector>
 
+struct lua_State;
+
 namespace openspace::scripting {
 
 /**
@@ -43,6 +44,8 @@ struct LuaLibrary {
      * the function.
      */
     struct Function {
+        using lua_CFunction =int(*)(lua_State* L);
+
         /// The name of the function
         std::string name;
         /// The function pointer that is executed if the function is called