Adopt upstream improvements: modernize dependencies, safety fixes, SwiftLint

 - Replace LaunchAtLogin with LaunchAtLogin-Modern
 - Bump deployment target to macOS 13.0 (required by LaunchAtLogin-Modern)
 - Bump KeyboardShortcuts 2.3 → 2.4
 - Fix force casts and IUOs in SpaceSwitcher, GuiSize, PreferencesViewModel
 - Add SwiftLint config and build phase
 - Remove orphaned SUUpdater from storyboard
 - Gitignore xcuserdata and remove tracked xcuserstate

Author: ruittenb

index.html

@@ -156,7 +156,7 @@ <h2>A macOS app to view, rename and navigate between Spaces (Virtual Desktops) i
             </hgroup>
 
             <dl class="AppDetails_grid">
-                <div><dt>Platform</dt><dd>macOS 11.0 +</dd></div>
+                <div><dt>Platform</dt><dd>macOS 13.0 +</dd></div>
                 <div><dt>Size</dt><dd id="app-size">~4.4 MB</dd></div>
                 <div><dt>Version</dt><dd id="version-number">v1.12+</dd></div>
                 <div><dt>Updated</dt><dd id="updated-date">2025</dd></div>