Add ProBuilder package

Add com.unity.probuilder 6.0.9 to the manifest and lockfile, with its
default per-project settings.

Packages/manifest.json

@@ -6,6 +6,7 @@
     "com.unity.inputsystem": "1.19.0",
     "com.unity.multiplayer.center": "1.0.1",
     "com.unity.netcode.gameobjects": "2.13.0",
+    "com.unity.probuilder": "6.0.9",
     "com.unity.render-pipelines.universal": "17.3.0",
     "com.unity.services.multiplayer": "2.2.4",
     "com.unity.timeline": "1.8.12",

Packages/packages-lock.json

@@ -113,6 +113,18 @@
       "dependencies": {},
       "url": "https://packages.unity.com"
     },
+    "com.unity.probuilder": {
+      "version": "6.0.9",
+      "depth": 0,
+      "source": "registry",
+      "dependencies": {
+        "com.unity.shadergraph": "17.0.3",
+        "com.unity.modules.imgui": "1.0.0",
+        "com.unity.modules.physics": "1.0.0",
+        "com.unity.settings-manager": "1.0.3"
+      },
+      "url": "https://packages.unity.com"
+    },
     "com.unity.render-pipelines.core": {
       "version": "17.3.0",
       "depth": 1,
@@ -235,7 +247,7 @@
     },
     "com.unity.settings-manager": {
       "version": "2.1.1",
-      "depth": 2,
+      "depth": 1,
       "source": "registry",
       "dependencies": {},
       "url": "https://packages.unity.com"