🔧 infra: remove root package.json to fix Unity project file conflicts

Author: soo-bak

Packages/com.soobak.algo.core/package.json

@@ -13,8 +13,6 @@
     "runner",
     "visualization"
   ],
-  "dependencies": {
-    "com.cysharp.unitask": "https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask#2.5.3"
-  },
+  "dependencies": {},
   "samples": []
 }

Packages/com.soobak.algo.search/package.json

@@ -14,8 +14,7 @@
     "visualization"
   ],
   "dependencies": {
-    "com.soobak.algo.core": "0.1.0",
-    "com.cysharp.unitask": "https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask#2.5.3"
+    "com.soobak.algo.core": "0.1.0"
   },
   "samples": []
 }

Packages/com.soobak.algo.sorting/package.json

@@ -14,8 +14,7 @@
                      "visualization"
                  ],
     "dependencies":  {
-                         "com.soobak.algo.core":  "0.1.0",
-                         "com.cysharp.unitask":  "https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask#2.5.3"
+                         "com.soobak.algo.core":  "0.1.0"
                      },
     "samples":  [
                     {

README.md

@@ -18,12 +18,11 @@ Reusable Unity 6 algorithm pipeline. `com.soobak.algo.core` defines execution pr
 3. Consumers either pass an `ISortingAlgorithm` directly or call `ExecuteAsync("quick-sort", state, token)`.
 4. Each step broadcasts a cloned `SortingState` and a `SortOp` event so visualizers receive immutable snapshots.
 
-1. Add the complete package from Git URL:
-   ```
-   https://github.com/soo-bak/soobak-algo-core.git
-   ```
+1. **Install UniTask first** (required dependency):
+   - Open Unity Package Manager
+   - Add package from Git URL: `https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask#2.5.3`
 
-2. Or add individual packages using path parameters:
+2. **Add individual packages using path parameters**:
    ```json
    {
      "dependencies": {