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.

assets/project-templates/place/default.project.json

@@ -1,72 +0,0 @@
-{
-  "name": "{project_name}",
-  "tree": {
-    "$className": "DataModel",
-
-    "ReplicatedStorage": {
-      "Shared": {
-        "$path": "src/shared"
-      }
-    },
-
-    "ServerScriptService": {
-      "Server": {
-        "$path": "src/server"
-      }
-    },
-
-    "StarterPlayer": {
-      "StarterPlayerScripts": {
-        "Client": {
-          "$path": "src/client"
-        }
-      }
-    },
-
-    "Workspace": {
-      "$properties": {
-        "FilteringEnabled": true
-      },
-      "Baseplate": {
-        "$className": "Part",
-        "$properties": {
-          "Anchored": true,
-          "Color": [
-            0.38823,
-            0.37254,
-            0.38823
-          ],
-          "Locked": true,
-          "Position": [
-            0,
-            -10,
-            0
-          ],
-          "Size": [
-            512,
-            20,
-            512
-          ]
-        }
-      }
-    },
-    "Lighting": {
-      "$properties": {
-        "Ambient": [
-          0,
-          0,
-          0
-        ],
-        "Brightness": 2,
-        "GlobalShadows": true,
-        "Outlines": false,
-        "Technology": "Voxel"
-      }
-    },
-    "SoundService": {
-      "$properties": {
-        "RespectFilteringEnabled": true
-      }
-    }
-  }
-}