✨ Ability to use window corner radius in preview + SkyLightToolBelt & SkyLightSymbolLoader

[mrkai77]

• Consolidates all SkyLight interactions into a new SkyLightToolBelt file. Several SkyLight functions were previously scattered across the codebase, so they’ve been centralized with wrapper functions for cleaner and easier usage.
• Adds SkyLightSymbolLoader to dynamically load private SkyLight APIs, since some symbols are only available on newer macOS versions. Other private API definitions have also been moved into PrivateApis.swift.
• Adds a new feature for the preview window to use the selected window’s actual corner radius instead of a user-defined value.

[Copilot]

Pull request overview

This PR refactors and enhances window corner radius handling in preview windows by consolidating SkyLight API interactions and adding dynamic loading capabilities for private APIs.

• Centralizes SkyLight API interactions into a dedicated SkyLightToolBelt and adds SkyLightSymbolLoader for runtime symbol resolution
• Enables preview windows to use the actual corner radius of selected windows
• Refactors logging to use description instead of debugDescription where appropriate

Reviewed changes

Copilot reviewed 20 out of 20 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
Loop/Stashing/StashManager.swift	Updated logging calls to use description instead of debugDescription for Window objects
Loop/Localizable.xcstrings	Added localization strings for corner radius configuration options and bumped version to 1.1
Loop/Extensions/RectangleCornerRadii+Extensions.swift	New extension providing inset method for adjusting corner radii with minimum radius constraint
Loop/Extensions/Defaults+Extensions.swift	Added previewUseWindowCornerRadius user default to toggle between window-specific and default corner radius
Loop/Extensions/AXUIElement+Extensions.swift	Updated function name from _AXUIElementGetWindow to AXUIElementGetWindow to match declaration in PrivateApis.swift
Loop/Core/WindowDragManager.swift	Updated logging to use description for Window objects
Loop/Core/LoopManager.swift	Refactored window handling to delay targetWindow assignment, improved isLoopActive flag management, and updated logging to use description

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[SenpaiHunters]

This finally compiles for macOS 15, testing locally. Hopefully, when built with actions, we don't see any errors or crashes!