feat: romaji plugin (without dict)

BetterLyrics.Core/Interfaces/ILyricsSearchPlugin.cs

@@ -5,12 +5,8 @@ using System.Text;
 
 namespace BetterLyrics.Core.Interfaces
 {
-    public interface ILyricsProvider
+    public interface ILyricsSearchPlugin : IPlugin
     {
-        string Id { get; }
-        string Name { get; }
-        string Author { get; }
-
         Task<LyricsSearchResult> GetLyricsAsync(string title, string artist, string album, double duration);
     }
 }

BetterLyrics.Core/Interfaces/ILyricsTransliterationPlugin.cs

@@ -0,0 +1,11 @@
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace BetterLyrics.Core.Interfaces
+{
+    public interface ILyricsTransliterationPlugin : IPlugin
+    {
+        Task<string?> GetTransliterationAsync(string text, string targetLangCode);
+    }
+}

BetterLyrics.Core/Interfaces/IPlugin.cs

@@ -0,0 +1,17 @@
+using BetterLyrics.Core.Models;
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace BetterLyrics.Core.Interfaces
+{
+    public interface IPlugin
+    {
+        string Id { get; }
+        string Name { get; }
+        string Description { get; }
+        string Author { get; }
+
+        void Initialize();
+    }
+}