Added defensive logic to File Indexer for scenarios where file does not exist on disk. Added ability to reset the search index prior to reindexing.

Oqtane.Shared/Interfaces/ISearchService.cs

@@ -9,5 +9,7 @@ namespace Oqtane.Services
         Task<SearchResults> GetSearchResultsAsync(SearchQuery searchQuery);
 
         Task<string> SaveSearchContentsAsync(List<SearchContent> searchContents, Dictionary<string, string> siteSettings);
+
+        Task DeleteSearchContentsAsync(int siteId);
     }
 }