Add Input System package

Packages/manifest.json

@@ -2,6 +2,7 @@
   "dependencies": {
     "com.unity.collab-proxy": "2.0.5",
     "com.unity.feature.development": "1.0.1",
+    "com.unity.inputsystem": "1.6.3",
     "com.unity.textmeshpro": "3.0.6",
     "com.unity.timeline": "1.7.4",
     "com.unity.ugui": "1.0.0",

Packages/packages-lock.json

@@ -60,6 +60,15 @@
       "dependencies": {},
       "url": "https://packages.unity.com"
     },
+    "com.unity.inputsystem": {
+      "version": "1.6.3",
+      "depth": 0,
+      "source": "registry",
+      "dependencies": {
+        "com.unity.modules.uielements": "1.0.0"
+      },
+      "url": "https://packages.unity.com"
+    },
     "com.unity.performance.profile-analyzer": {
       "version": "1.2.2",
       "depth": 1,