[PATCH v17 0/7] MR7610: win32u: Create a shared object for user handle entries.

[Rémi Bernon]

For https://gitlab.winehq.org/wine/wine/-/merge_requests/7512 to use it to locate window shared objects.

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  v17: win32u: Use the session shared object for user handle entries.
       win32u: Use the session shared object to implement is_window.
       server: Move the user object handle table to the shared memory.
       server: Allocate a session shared memory header structure.
       server: Use NTUSER_OBJ constants for user object types.
       server: Remove const qualifier from shared memory pointers.
       include: Implement ReadAcquire64.
 
https://gitlab.winehq.org/wine/wine/-/merge_requests/7610