Allow loading any document in some assistants (#508)

Co-authored-by: krut_ni <nils.kruthoff@dlr.de>
Co-authored-by: Thorsten Sommer <mail@tsommer.org>

app/MindWork AI Studio/Components/ReadFileContent.razor.cs

@@ -0,0 +1,45 @@
+using AIStudio.Tools.Rust;
+using AIStudio.Tools.Services;
+
+using Microsoft.AspNetCore.Components;
+
+namespace AIStudio.Components;
+
+public partial class ReadFileContent : MSGComponentBase
+{
+    [Parameter]
+    public string FileContent { get; set; } = string.Empty;
+    
+    [Parameter]
+    public EventCallback<string> FileContentChanged { get; set; }
+    
+    [Inject]
+    private RustService RustService { get; init; } = null!;
+    
+    private async Task SelectFile()
+    {
+        var selectedFile = await this.RustService.SelectFile(T("Select file to read its content"));
+        if (selectedFile.UserCancelled)
+            return;
+        
+        if(!File.Exists(selectedFile.SelectedFilePath))
+            return;
+        
+        var ext = Path.GetExtension(selectedFile.SelectedFilePath).TrimStart('.');
+        if (Array.Exists(FileTypeFilter.Executables.FilterExtensions, x => x.Equals(ext,  StringComparison.OrdinalIgnoreCase)))
+        {
+            await MessageBus.INSTANCE.SendError(new(Icons.Material.Filled.AppBlocking, T("Executables are not allowed")));
+            return;
+        }
+        
+        if (Array.Exists(FileTypeFilter.AllImages.FilterExtensions, x => x.Equals(ext,  StringComparison.OrdinalIgnoreCase)))
+        {
+            await MessageBus.INSTANCE.SendWarning(new(Icons.Material.Filled.ImageNotSupported, T("Images are not supported yet")));
+            return;
+        }
+        
+        var streamId = Guid.NewGuid().ToString();
+        var fileContent = await this.RustService.ReadArbitraryFileData(selectedFile.SelectedFilePath, streamId, int.MaxValue);
+        await this.FileContentChanged.InvokeAsync(fileContent);
+    }
+}