Added file patterns and exclusions to folder data sources (#1057)

Co-authored-by: Thorsten Sommer <SommerEngineering@users.noreply.github.com>

app/MindWork AI Studio/Tools/Services/DataSourceEmbeddingIgnoredFile.cs

@@ -0,0 +1,13 @@
+namespace AIStudio.Tools.Services;
+
+/// <summary>
+/// A file which matches the configured part of a local data source, but was skipped before text
+/// extraction.
+/// </summary>
+/// <remarks>
+/// Files below folders the user chose not to scan never reach enumeration and therefore do not
+/// appear here. Temporary and system files are implementation details and stay hidden as well.
+/// </remarks>
+/// <param name="FilePath">The absolute path of the ignored file.</param>
+/// <param name="Reason">Why the file was ignored.</param>
+public sealed record DataSourceEmbeddingIgnoredFile(string FilePath, DataSourceEmbeddingIgnoreReason Reason);