Fix Root Path Issues

#### PR Classification New feature implementation and code improvement. #### PR Summary This pull request introduces new methods for handling file and folder selections, enhancing the user experience. Key changes include: - `Utils.cs`: Added `SanitizeDirectoryName` and `SelectFileWithDefault` methods; updated `SelectFolderWithDefault` to ensure paths end with a slash. - `LocalLibrary.cs`: Refactored to utilize the new selection methods for improved file and folder handling. - `extension.yaml`: Updated version number from 1.8.1 to 1.8.2.