feat: Fixes spawner bugs with position finding, Adds [ShowSpawnerBorders (#2297)

### Summary

- Fixes BaseSpawner and Spawner bugs.
- Adds [ShowSpawnerBorders to see the spawn bounds.

Projects/UOContent/Migrations/Server.Items.ProjectedItem.v0.json

@@ -0,0 +1,19 @@
+{
+  "version": 0,
+  "type": "Server.Items.ProjectedItem",
+  "properties": [
+    {
+      "name": "EffectItemId",
+      "type": "int",
+      "rule": "PrimitiveTypeMigrationRule",
+      "ruleArguments": [
+        ""
+      ]
+    },
+    {
+      "name": "MinimumVisible",
+      "type": "Server.AccessLevel",
+      "rule": "EnumMigrationRule"
+    }
+  ]
+}