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/targeting.json

@@ -0,0 +1,55 @@
+{
+  "category": "Targeting",
+  "packets": [
+    {
+      "id": "0x6C",
+      "name": "Target Response",
+      "description": "Client responds to a target cursor request.",
+      "direction": "incoming",
+      "isDynamic": false,
+      "size": 19,
+      "fields": [
+        { "name": "packetId", "type": "byte", "size": 1, "value": "0x6C", "description": "Packet identifier" },
+        {
+          "name": "type",
+          "type": "enum",
+          "enumType": "sequential",
+          "size": 1,
+          "description": "Target type",
+          "values": [
+            { "value": 0, "name": "Object", "description": "Targeting a specific object (mobile/item)" },
+            { "value": 1, "name": "Location", "description": "Targeting a location/tile" }
+          ]
+        },
+        { "name": "targetId", "type": "int", "size": 4, "description": "Target cursor ID to match request" },
+        {
+          "name": "flags",
+          "type": "enum",
+          "enumType": "sequential",
+          "size": 1,
+          "description": "Target flags",
+          "values": [
+            { "value": 0, "name": "Neutral", "description": "Neutral targeting" },
+            { "value": 1, "name": "Harmful", "description": "Harmful action" },
+            { "value": 2, "name": "Beneficial", "description": "Beneficial action" },
+            { "value": 3, "name": "Cancel", "description": "Targeting canceled" }
+          ]
+        },
+        { "name": "targetSerial", "type": "uint", "size": 4, "description": "Serial of targeted object (0 for ground)" },
+        { "name": "x", "type": "short", "size": 2, "description": "Target X coordinate (-1 if canceled)" },
+        { "name": "y", "type": "short", "size": 2, "description": "Target Y coordinate (-1 if canceled)" },
+        { "name": "unknown", "type": "byte", "size": 1, "description": "Unknown (typically 0)" },
+        { "name": "z", "type": "sbyte", "size": 1, "description": "Target Z coordinate" },
+        { "name": "graphic", "type": "ushort", "size": 2, "description": "Graphic ID of targeted tile (0 for land)" }
+      ],
+      "related": [
+        { "id": "0x6C", "relationship": "request", "note": "Target Request packet that initiated this" }
+      ],
+      "notes": "If x == -1 && y == -1 && serial is invalid, user pressed Escape to cancel targeting.",
+      "source": {
+        "file": "Projects/UOContent/Network/Packets/IncomingTargetingPackets.cs",
+        "line": 28
+      }
+    }
+  ]
+}