Feature: Remove FullTrust handlers

[hez2010]

We are migrating to WindowsAppSDK, thus there's no longer need for fulltrust process for interop. This will bring performance improvements since the overhead of (de)serialization and IPC can be avoided.

While removing handlers, note that we no longer need (de)serialization, so we should also remove all serialization code and use the underlying data directly. For example, base64-byte[].

Using this issue for tracking work-items of fulltrust handlers removal.

Requirements

• remove these handlers
• ApplicationLaunchHandler
• ContextMenuHandler
• DesktopWallpaperHandler
• DriveHandler
• FileOperationsHandler
• FileTagsHandler
• IMessageHandler
• InstallOperationsHandler
• LibrariesHandler (assigned to @itsWindows11)
• NetworkDrivesHandler
• QuickLookHandler
• RecentItemsHandler
  • Watchers
  • Others
• RecycleBinHandler (assigned to @lukeblevins)
  • Watchers
  • Others
• Win32MessageHandler
  • Watchers
  • Others

[lukeblevins]

@hez2010 I can take care of removing RecentItemsHandler once #9857 is merged because we'd want to have baked in support for a number of service implementations capable of listing/aggregating recent items from a multitude of sources down the road.

@yaichenbaum FYI

[yaira2]

@lukeblevins I'm wondering if @jiejasonliu might want to do the RecentItemsHandler since they were just working on this feature a couple months ago.

[lukeblevins]

@yaichenbaum @jiejasonliu Please let me know.

[jiejasonliu]

@lukeblevins @yaichenbaum I'm probably not going to be able to get to this anytime soon due to school. If you can get around doing this in the next month or so, I encourage it.

I can offer to be a primary/secondary reviewer to any pull requests related to it and also feel free to DM me of any questions, I'm on the Files discord server (Jason#9955).