feat: add subsonic proxy architecture with external music services

- Add MusicModels (Song, Artist, Album, SearchResult, DownloadInfo)
- Add IMusicMetadataService and DeezerMetadataService for external search
- Add IDownloadService and DeezspotDownloadService for downloads
- Add LocalLibraryService for managing downloaded songs cache
- Add custom endpoints: search3, stream, getSong, getAlbum, getCoverArt
- Configure dependency injection for all services

octo-fiesta/Program.cs

@@ -1,4 +1,5 @@
 using octo_fiesta.Models;
+using octo_fiesta.Services;
 
 var builder = WebApplication.CreateBuilder(args);
 
@@ -9,9 +10,15 @@ builder.Services.AddHttpClient();
 builder.Services.AddEndpointsApiExplorer();
 builder.Services.AddSwaggerGen();
 
+// Configuration
 builder.Services.Configure<SubsonicSettings>(
     builder.Configuration.GetSection("Subsonic"));
 
+// Services métier
+builder.Services.AddSingleton<ILocalLibraryService, LocalLibraryService>();
+builder.Services.AddScoped<IMusicMetadataService, DeezerMetadataService>();
+builder.Services.AddScoped<IDownloadService, DeezspotDownloadService>();
+
 builder.Services.AddCors(options =>
 {
     options.AddDefaultPolicy(policy =>
@@ -22,22 +29,22 @@ builder.Services.AddCors(options =>
             .WithExposedHeaders("X-Content-Duration", "X-Total-Count", "X-Nd-Authorization");
     });
 });
-
-var app = builder.Build();
-
-// Configure the HTTP request pipeline.
-if (app.Environment.IsDevelopment())
-{
-    app.UseSwagger();
-    app.UseSwaggerUI();
-}
-
-app.UseHttpsRedirection();
-
-app.UseAuthorization();
-
-app.UseCors();
-
-app.MapControllers();
-
+
+var app = builder.Build();
+
+// Configure the HTTP request pipeline.
+if (app.Environment.IsDevelopment())
+{
+    app.UseSwagger();
+    app.UseSwaggerUI();
+}
+
+app.UseHttpsRedirection();
+
+app.UseAuthorization();
+
+app.UseCors();
+
+app.MapControllers();
+
 app.Run();