OneDrive: Improved max path error experience on desktop

OneDrive desktop sync users now get clearer, more actionable error messages when file paths exceed the supported 520-character limit. The updated experience shows exactly how many characters a path exceeds the limit and points users to the specific folder location where they can shorten names to resolve the issue. When multiple files in the same folder are affected, a single consolidated message guides users to the right location, reducing error noise and making resolution faster. Available on both Windows and Mac.