add unitask

Packages/manifest.json

@@ -1,6 +1,7 @@
 {
   "dependencies": {
     "com.boxqkrtm.ide.cursor": "https://github.com/boxqkrtm/com.unity.ide.cursor.git",
+    "com.cysharp.unitask": "https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask",
     "com.github-glitchenzo.nugetforunity": "https://github.com/GlitchEnzo/NuGetForUnity.git?path=/src/NuGetForUnity",
     "com.unity.2d.sprite": "1.0.0",
     "com.unity.addressables": "2.7.4",

Packages/packages-lock.json

@@ -9,6 +9,13 @@
       },
       "hash": "38fecf55e4fd94ccfe58a92ed8ad1a529ba1694e"
     },
+    "com.cysharp.unitask": {
+      "version": "https://github.com/Cysharp/UniTask.git?path=src/UniTask/Assets/Plugins/UniTask",
+      "depth": 0,
+      "source": "git",
+      "dependencies": {},
+      "hash": "73a63b7f672b88f7e9992f6917eb458a8cbb6fa9"
+    },
     "com.github-glitchenzo.nugetforunity": {
       "version": "https://github.com/GlitchEnzo/NuGetForUnity.git?path=/src/NuGetForUnity",
       "depth": 0,