Support for WindowStyle

Description

Creating custom UI is a MUST. Replacing the Titlebar is a must-have for Windows. This is all in the context of a Blazor Hybrid app.
I have tried messing with ContentPage and Application tags in XAML, and haven't got anywhere. The closest I got was using the following abomination, but it only got me half-way there.

var hwnd = WindowNative.GetWindowHandle(del);
                    var style = User32.GetWindowLong(hwnd, User32.WindowLongIndexFlags.GWL_STYLE);
                    style &= ~(int)User32.SetWindowLongFlags.WS_CAPTION;
                    style = style & ~(int)User32.SetWindowLongFlags.WS_SYSMENU;
                    style = style & ~(int)User32.SetWindowLongFlags.WS_THICKFRAME;
                    style = style & ~(int)User32.SetWindowLongFlags.WS_MINIMIZE;
                    style = style & ~(int)User32.SetWindowLongFlags.WS_MAXIMIZEBOX;
                    style = style & ~(int)User32.SetWindowLongFlags.WS_MAXIMIZE;
                    style = style & ~(int)User32.SetWindowLongFlags.WS_MINIMIZEBOX;
                    var test1 = User32.SetWindowLong(WindowNative.GetWindowHandle(del), User32.WindowLongIndexFlags.GWL_STYLE, (User32.SetWindowLongFlags)style);
                    var test2 = User32.SetWindowLong(hwnd,
                        User32.WindowLongIndexFlags.GWL_EXSTYLE,
                        (User32.SetWindowLongFlags)(User32.GetWindowLong(hwnd, User32.WindowLongIndexFlags.GWL_EXSTYLE))
                        | User32.SetWindowLongFlags.WS_EX_DLGMODALFRAME);
                    var test3 = User32.SetWindowPos(hwnd, new IntPtr(0), 0, 0, 0, 0, User32.SetWindowPosFlags.SWP_NOMOVE | User32.SetWindowPosFlags.SWP_NOSIZE | User32.SetWindowPosFlags.SWP_FRAMECHANGED);

The following didn't get me any closer either:

builder.ConfigureLifecycleEvents(lifecycle => {
    lifecycle.AddWindows(windows => windows.OnWindowCreated((del) => {
        del.ExtendsContentIntoTitleBar = true;
    }));
});

My attempted workaround for a frameless/borderless MAUI app. This failed horribly:

Maybe I'm just missing something.

Public API Changes

<ContentPage xmlns="http://schemas.microsoft.com/dotnet/2021/maui"
             xmlns:x="http://schemas.microsoft.com/winfx/2009/xaml"
             WindowStyle="None"

to perform the same as

<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
        xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
        WindowStyle="None"

where WindowStyle completely hides the Titlebar.

Intended Use-Case

Any application where the developer wants to create a custom title bar. Almost every app has this and is a really important thing to have in Blazor Hybrid/MAUI.
Of course, this should only affect Windows, but maybe there's a similar toggle for Mac/Linux? Anyway, regardless, this is something that's really needed if it's not already here.
I may have completely missed it and am doing something I shouldn't be.

Heck, even VS has a custom title bar:

Start with the proposed ContentPage WindowStyle XAML API and the Windows ConfigureLifecycleEvents/OnWindowCreated entry point described in the issue. Review how the existing WindowNative and User32 workaround changes title-bar styles; done means WindowStyle="None" hides the Windows title bar for a MAUI or Blazor Hybrid ContentPage.