Add ResourceHub for real-time updates and implement web dashboard with REST API

- Created ResourceHub.cs for SignalR group management.
- Developed a modern web dashboard using Tailwind CSS for responsive design.
- Implemented real-time updates with SignalR for CPU, Memory, GPU, and Network usage.
- Added REST API endpoints for resource information and process management.
- Integrated process management features to view and terminate high-usage processes.
- Enhanced UI with loading spinners, notifications, and responsive tables.
- Included performance charts for historical CPU and Memory usage.
- Configured Swagger UI for API documentation.
- Established security features including process kill restrictions and API key authentication.

Hubs/ResourceHub.cs

@@ -0,0 +1,17 @@
+using Microsoft.AspNetCore.SignalR;
+
+namespace ResourceMonitorService.Hubs
+{
+    public class ResourceHub : Hub
+    {
+        public async Task JoinGroup(string groupName)
+        {
+            await Groups.AddToGroupAsync(Context.ConnectionId, groupName);
+        }
+
+        public async Task LeaveGroup(string groupName)
+        {
+            await Groups.RemoveFromGroupAsync(Context.ConnectionId, groupName);
+        }
+    }
+}