Add component to read PDF files into assistants (#439)

app/MindWork AI Studio/Tools/Metadata/MetaDataArchitecture.cs

@@ -2,7 +2,7 @@
 namespace AIStudio.Tools.Metadata;
 
 [AttributeUsage(AttributeTargets.Assembly)]
-public class MetaDataArchitecture(string architecture) : Attribute
+public class MetaDataArchitectureAttribute(string architecture) : Attribute
 {
     public string Architecture => architecture;
 }

app/MindWork AI Studio/Tools/Metadata/MetaDataLibrariesAttribute.cs

@@ -0,0 +1,6 @@
+namespace AIStudio.Tools.Metadata;
+
+public class MetaDataLibrariesAttribute(string pdfiumVersion) : Attribute
+{
+    public string PdfiumVersion => pdfiumVersion;
+}

app/MindWork AI Studio/Tools/Services/RustService.Retrieval.cs

@@ -0,0 +1,16 @@
+namespace AIStudio.Tools.Services;
+
+public sealed partial class RustService
+{
+    public async Task<string> GetPDFText(string filePath)
+    {
+        var response = await this.http.GetAsync($"/retrieval/fs/read/pdf?file_path={filePath}");
+        if (!response.IsSuccessStatusCode)
+        {
+            this.logger!.LogError($"Failed to read the PDF file due to an network error: '{response.StatusCode}'");
+            return string.Empty;
+        }
+
+        return await response.Content.ReadAsStringAsync();
+    }
+}