[PATCH v3 0/19] MR6766: dlls/wintypes: Implement Windows.Foundation.Collections.PropertySet.

[Vibhav Pant (＠vibhavp)]

The implementation is backed by a smaller `IWinePropertySetImpl` interface for core operations (insertion, lookup, removal, iteration), which currently uses an `rb_tree` to store `HSTRING`-`IInspectable *` value pairs.

If needed, the \``IWinePropertySetImpl`\` implementation can be later swapped out with a hash table for performance reasons, as `PropertySet` does not have an enumeration order guarantee, at least according to the MSDN docs.

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  v3: dlls/wintypes: Implement IMapView methods get_Size, HasKey, Lookup, Split for PropertySet.
      dlls/wintypes: Invoke MapChanged event handlers from PropertSet on entry removal and Clear().
      dlls/wintypes: Invoke MapChanged event handlers from PropertySet on insertion.
      dlls/wintypes: Implement get_Current() for the IIterator implementation obtained from PropertySet.
      dlls/wintypes: Implement IIterator methods MoveNext() and get_HasCurrent() for PropertySet.
      dlls/wintypes: Implement IMap method GetView() for PropertySet.
      dlls/wintypes: Implement IMap methods HasKey, get_Count and Remove for PropertySet.
      dlls/wintypes: Implement IMap method Clear() for PropertySet.
      dlls/wintypes: Implement IMap methods Insert() and Lookup() for PropertySet.
      dlls/wintypes: Implement adding/removing IMapChangedEventHandlers for IObservableMap<HSTRING, IInspectable *>.
      dlls/wintypes: Add stubs for IKeyValuePair<HSTRING, IInspectable *>.
      dlls/wintypes: Add stubs for IIterator<IKeyValuePair<HSTRING, IInspectable *>>.
      dlls/wintypes: Add stubs for IMapView<HSTRING, IInspectable *>.
      dlls/wintypes: Add IIterable<IKeyValuePair<HSTRING, IInspectable *>> stubs to PropertySet implementation.
      dlls/wintypes: Add IObservableMap<HSTRING, IInspectable *> stubs to PropertySet implementation.
      dlls/wintypes: Add IMap<HSTRING, IInspectable *> stubs to PropertySet implementation.
      dlls/wintypes: Add stub for Windows.Foundation.Collections.PropertySet.
      dlls/wintypes/test: Add conformance tests for Windows.Foundation.Collections.PropertySet.
 
This merge request has too many patches to be relayed via email.
Please visit the URL below to see the contents of the merge request.
https://gitlab.winehq.org/wine/wine/-/merge_requests/6766