Initial commit: RR3 Community Server with web admin panel

- ASP.NET Core 8 REST API server
- 12 API endpoints matching EA Synergy protocol
- SQLite database with Entity Framework Core
- Web admin panel with Bootstrap 5
- User, Catalog, Session, Purchase management
- Comprehensive documentation

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

RR3CommunityServer/Models/ApiModels.cs

@@ -0,0 +1,90 @@
+namespace RR3CommunityServer.Models;
+
+// Standard Synergy API response wrapper
+public class SynergyResponse<T>
+{
+    public int resultCode { get; set; } = 0;  // 0 = success, negative = error
+    public string? message { get; set; }
+    public T? data { get; set; }
+}
+
+// User models
+public class DeviceIdResponse
+{
+    public string deviceId { get; set; } = string.Empty;
+    public string synergyId { get; set; } = string.Empty;
+    public long timestamp { get; set; }
+}
+
+public class AnonUidResponse
+{
+    public string anonUid { get; set; } = string.Empty;
+    public long expiresAt { get; set; }
+}
+
+// Product/Catalog models
+public class CatalogItem
+{
+    public string itemId { get; set; } = string.Empty;
+    public string sku { get; set; } = string.Empty;
+    public string name { get; set; } = string.Empty;
+    public string description { get; set; } = string.Empty;
+    public string category { get; set; } = string.Empty;
+    public decimal price { get; set; }
+    public string currency { get; set; } = "USD";
+    public Dictionary<string, object> metadata { get; set; } = new();
+}
+
+public class CatalogCategory
+{
+    public string categoryId { get; set; } = string.Empty;
+    public string name { get; set; } = string.Empty;
+    public List<string> itemIds { get; set; } = new();
+}
+
+// DRM models
+public class DrmNonceResponse
+{
+    public string nonce { get; set; } = string.Empty;
+    public long expiresAt { get; set; }
+}
+
+public class PurchasedItem
+{
+    public string itemId { get; set; } = string.Empty;
+    public string sku { get; set; } = string.Empty;
+    public string orderId { get; set; } = string.Empty;
+    public long purchaseTime { get; set; }
+    public string token { get; set; } = string.Empty;
+}
+
+public class PurchaseVerificationRequest
+{
+    public string receipt { get; set; } = string.Empty;
+    public string signature { get; set; } = string.Empty;
+    public string sku { get; set; } = string.Empty;
+    public string orderId { get; set; } = string.Empty;
+}
+
+// Tracking models
+public class TrackingEvent
+{
+    public string eventType { get; set; } = string.Empty;
+    public long timestamp { get; set; }
+    public Dictionary<string, object> properties { get; set; } = new();
+}
+
+// Director/Service Discovery
+public class DirectorResponse
+{
+    public Dictionary<string, string> serverUrls { get; set; } = new()
+    {
+        { "synergy.product", "https://localhost:5001" },
+        { "synergy.drm", "https://localhost:5001" },
+        { "synergy.user", "https://localhost:5001" },
+        { "synergy.tracking", "https://localhost:5001" },
+        { "synergy.s2s", "https://localhost:5001" }
+    };
+    public string environment { get; set; } = "COMMUNITY";
+    public string version { get; set; } = "1.0.0";
+}