UTM Virtual Machines 4+

## Highlights
UTM Remote server for macOS: On macOS 13+, you can enable UTM Server from the new option on the home screen or from Window -> UTM Server. Once enabled, you can stream QEMU backend VMs to supported clients. The preferences page includes additional options including auto-starting the server and allowing external connections so it can be used outside of the local network. New documentation pages will be added in the future. The remote client will be on the iOS and visionOS App Store shortly.

## Other Changes
* Improved icon selector UI (thanks @js-john)
* Changed the position of destructive buttons in various confirmation alerts to better comply with Apple Human Interface Guidelines
* Wizard: New options for "Other" operating system to allow for Floppy boot as well as legacy hardware (useful for setting up a DOS machine)
* Wizard: Fixed an issue where the Windows Guest Tools will be downloaded even when a non-Windows VM is created
* New setting: "Capture input automatically when window is focused" when enabled will automatically capture mouse/keyboard when a QEMU VM is started and when the VM window is clicked on (thanks @js-john)
* (When "Capture input automatically when entering full screen" is enabled and the cursor moves to a different workspace (for example through a gesture), the cursor will be captured again upon re-entering the QEMU VM (#6242) (thanks @haroldm)
* Home: Support drag & drop onto a removable drive or shared directory (#3312) (thanks @hamtiko)
* Fixed an issue where cloning/moving an AVFW VM is extremely slower than Finder (#6262)
* Added a progress indicator for long duration tasks such as cloning/moving a VM or reclaiming free space (#4006)
* Fixed an issue with file locking resulting in VMs refusing to boot (#5757, #5830)
* Show confirmation popup for VM downloads (#6156)
* Removed automation URI scheme due to potential security issues (#6155)
* Fixed display of newly selected custom icon (#6137)
* Wizard: allow completely deleting RAM and storage size (#5885)
* Scripting: Fixed file and process commands not working due to incorrect object life cycle (#5963)
* Fixed a crash when removing a device while a text field is highlighted (#5901)
* Fixed error message when double-clicking on a headless VM which has already been started (#5972)
* AVF: New display option to disable dynamic resolution in macOS 14+ VMs (#5873)
* Remove "VM display size is fixed" global setting because it was confusing and does not do the right thing
* Fixed incorrect display scaling when host screen resolution is smaller than VM display size (#6214)
* Updated ANGLE to latest Safari version
* Fixed a crash due to screenshot being saved while the image was being destroyed (#4009)
* Fixed a memory leak caused by a retain cycle while observing changes in the VM state