Prevent opening new windows

There is electrons ["new-window"](https://github.com/electron/electron/blob/main/docs/api/web-contents.md#event-new-window-deprecated) event. But i can not call `event.preventDefault()` in C# code (event `browserWindow.OnNewWindowForTab`). How am i be able to prevent opening new windows of my application? (for example when the user middle-mouse-clicks a link)

However, it is marked deprecated in the documentation in favor of [this function on the webContents class](https://github.com/electron/electron/blob/main/docs/api/web-contents.md#contentssetwindowopenhandlerhandler). So how can i access that? There are plenty of methods that are not implemented in Electron.Net.

Related to #434

Start with Electron.NET's BrowserWindow.OnNewWindowForTab event and compare its binding with Electron's webContents.setWindowOpenHandler documentation linked in the issue. Review related issue #434 and existing webContents method bindings; done means an Electron.NET application can prevent new windows, including those opened by middle-clicking a link.

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