Improved the start of configuration plugins with tokenizers (#1039)

app/MindWork AI Studio/Tools/PluginSystem/StoredTokenizer.cs

@@ -0,0 +1,15 @@
+namespace AIStudio.Tools.PluginSystem;
+
+/// <summary>
+/// The tokenizer a provider of a configuration plugin points to: the copy stored below the data
+/// directory, along with the fingerprint of its content.
+/// </summary>
+/// <param name="Path">The stored copy, or an empty string when no tokenizer is stored.</param>
+/// <param name="Fingerprint">The fingerprint of the stored content, or an empty string when no file could be read.</param>
+internal readonly record struct StoredTokenizer(string Path, string Fingerprint)
+{
+    /// <summary>
+    /// No tokenizer is stored.
+    /// </summary>
+    public static readonly StoredTokenizer NONE = new(string.Empty, string.Empty);
+}