Add project configuration and test files in JSON5 format

- Introduced new configuration files for testing, including `default.project.json5`, `client_in_folder`, and others.
- Updated existing project files to use JSON5 format, ensuring consistency across configurations.
- Added new Lua scripts and model files to support various test cases.
- Adjusted snapshot files to align with the new project structure and properties.

test-projects/multi_partition_game/default.project.json

@@ -1,21 +0,0 @@
-{
-  "name": "multi_partition_game",
-  "tree": {
-    "$className": "DataModel",
-    "ReplicatedStorage": {
-      "$className": "ReplicatedStorage",
-      "Ack": {
-        "$path": "a"
-      },
-      "Bar": {
-        "$path": "b"
-      }
-    },
-    "HttpService": {
-      "$className": "HttpService",
-      "$properties": {
-        "HttpEnabled": true
-      }
-    }
-  }
-}