## Summary

This PR adds a **Direct IP Connection** feature that allows players to connect via TCP/IP without relying on Steam P2P networking.

## Use Cases
- LAN play with lower latency
- Playing without Steam relay servers
- Regions where Steam P2P has connectivity issues
- Testing and development

## Changes

### New Files
- `ClassLibrary1/Networking/DirectConnection.cs` - Complete TCP networking system

### Modified Files
- `ClassLibrary1/Networking/PacketSender.cs` - Added DirectIP mode routing
- `ClassLibrary1/DebugTools/DebugMenu.cs` - Added Direct Connect UI

## Features
- Server hosting on port 11000 (configurable)
- Client connection via IP address
- Packet framing with length prefix
- Thread-safe client management
- Auto local IP detection
- New hotkey: Shift+F2 for Direct Connect window

## Usage

### As Host:
1. Press `Shift + F2`
2. Click "Create Room (Host)"
3. Share displayed IP with friend

### As Client:
1. Press `Shift + F2`
2. Enter host's IP address
3. Click "Join Room (Join)"

## Network Requirements
- **LAN**: No setup needed, use local IP
- **Internet**: Port forward 11000 TCP, or use ZeroTier/Tailscale