Add a new bindings2/scripts directory for Dart bindings

sky/engine/bindings2/scripts/idl_types.py

Index: sky/engine/bindings2/scripts/idl_types.py
diff --git a/sky/engine/bindings/scripts/idl_types.py b/sky/engine/bindings2/scripts/idl_types.py
similarity index 98%
copy from sky/engine/bindings/scripts/idl_types.py
copy to sky/engine/bindings2/scripts/idl_types.py
index 1b22eb6772ce83ce789a28946923bffb917392f7..ffdae966356d57fff47555bcdf1eb9934b6a80f3 100644
--- a/sky/engine/bindings/scripts/idl_types.py
+++ b/sky/engine/bindings2/scripts/idl_types.py
@@ -153,10 +153,6 @@ class IdlType(IdlTypeBase):
         return self.base_type in IdlType.callback_interfaces
 
     @property
-    def is_dictionary(self):
-        return self.base_type in IdlType.dictionaries
-
-    @property
     def is_enum(self):
         # FIXME: add an IdlEnumType class and a resolve_enums step at end of
         # IdlDefinitions constructor
@@ -186,7 +182,6 @@ class IdlType(IdlTypeBase):
         # In C++ these are RefPtr or PassRefPtr types.
         return not(self.is_basic_type or
                    self.is_callback_function or
-                   self.is_dictionary or
                    self.is_enum or
                    self.name == 'Any' or
                    self.name == 'Object' or
@@ -331,7 +326,7 @@ class IdlNullableType(IdlTypeBase):
 
     @property
     def name(self):
-        return self.inner_type.name + 'OrNull'
+        return self.inner_type.name
 
     def resolve_typedefs(self, typedefs):
         self.inner_type = self.inner_type.resolve_typedefs(typedefs)