Bug: Handle possible exception when checking directory ACLs.

[Cazzar]

It was possible for an UnauthorizedAccessException to throw during checking if a path is valid.

At this point, if we get such an error, safely log and return it is invalid.

Example exception

``` 11:02:28.309 ERR | Exception during raise of "Void Draw()" 11:02:28.309 ERR | System.UnauthorizedAccessException: Attempted to perform an unauthorized operation. 11:02:28.309 ERR | at System.Security.AccessControl.Win32.GetSecurityInfo(ResourceType resourceType, String name, SafeHandle handle, AccessControlSections accessControlSections, RawSecurityDescriptor& resultSd) 11:02:28.309 ERR | at System.Security.AccessControl.NativeObjectSecurity.CreateInternal(ResourceType resourceType, Boolean isContainer, String name, SafeHandle handle, AccessControlSections includeSections, Boolean createByName, ExceptionFromErrorCode exceptionFromErrorCode, Object exceptionContext) 11:02:28.309 ERR | at System.IO.FileSystemAclExtensions.GetAccessControl(DirectoryInfo directoryInfo) 11:02:28.309 ERR | at Ktisis.Helpers.Common.IsPathValid(String path) in /home/runner/work/Ktisis/Ktisis/Ktisis/Helpers/Common.cs:line 17 11:02:28.309 ERR | at Ktisis.Interface.Windows.FileDialogManager.setupDialog(String filters) in /home/runner/work/Ktisis/Ktisis/Ktisis/Interface/Windows/FileDialogManager.cs:line 96 11:02:28.309 ERR | at Ktisis.Interface.Windows.FileDialogManager.OpenFileDialog(String title, String filters, Action`2 callback, Int32 selectionCountMax, String startPath, Boolean isModal) in /home/runner/work/Ktisis/Ktisis/Ktisis/Interface/Windows/FileDialogManager.cs:line 52 11:02:28.309 ERR | at Ktisis.Interface.Windows.Workspace.Tabs.PoseTab.ImportExportPose(Actor* actor) in /home/runner/work/Ktisis/Ktisis/Ktisis/Interface/Windows/Workspace/Tabs/PoseTab.cs:line 174 11:02:28.309 ERR | at Ktisis.Interface.Windows.Workspace.Tabs.PoseTab.Draw(GameObject target) in /home/runner/work/Ktisis/Ktisis/Ktisis/Interface/Windows/Workspace/Tabs/PoseTab.cs:line 60 11:02:28.309 ERR | at Ktisis.Interface.Windows.Workspace.Workspace.Draw() in /home/runner/work/Ktisis/Ktisis/Ktisis/Interface/Windows/Workspace/Workspace.cs:line 94 11:02:28.309 ERR | at Ktisis.Interface.KtisisGui.Draw() in /home/runner/work/Ktisis/Ktisis/Ktisis/Interface/KtisisGui.cs:line 40 11:02:28.309 ERR | at Dalamud.Utility.EventHandlerExtensions.HandleInvoke(Action act) in C:\goatsoft\companysecrets\dalamud\Utility\EventHandlerExtensions.cs:line 112 ```