feat: Add interactive packet documentation system

- Create JSON-based packet documentation for 145 packets (66 incoming, 79 outgoing)
- Add HTML template with search, filtering, and navigation
- Support enum/bitfield field display with values and descriptions
- Support packet variants for version-specific structures
- Include 0xBF extended command subpackets documentation
- Add PowerShell build script to generate final HTML

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>

Distribution/Data/packets/incoming/movement.json

@@ -0,0 +1,27 @@
+{
+  "category": "Movement",
+  "packets": [
+    {
+      "id": "0x02",
+      "name": "Movement Request",
+      "description": "Sent by the client when the player attempts to move in a direction. The server responds with either MovementAck (0x22) if successful or MovementRej (0x21) if blocked.",
+      "direction": "incoming",
+      "isDynamic": false,
+      "size": 7,
+      "fields": [
+        { "name": "packetId", "type": "byte", "size": 1, "value": "0x02", "description": "Packet identifier" },
+        { "name": "direction", "type": "byte", "size": 1, "description": "Movement direction (0-7). Bit 0x80 indicates running." },
+        { "name": "sequence", "type": "byte", "size": 1, "description": "Movement sequence number (1-255, wraps). Used for ack/rej matching." },
+        { "name": "fastwalkKey", "type": "uint", "size": 4, "description": "Anti-speedhack prevention key. Set to 0 if fastwalk prevention is disabled." }
+      ],
+      "related": [
+        { "id": "0x21", "relationship": "rej", "note": "Sent if movement is blocked" },
+        { "id": "0x22", "relationship": "ack", "note": "Sent if movement is successful" }
+      ],
+      "source": {
+        "file": "Projects/UOContent/Network/Packets/IncomingMovementPackets.cs",
+        "line": 83
+      }
+    }
+  ]
+}