Update project configuration and snapshot files

- Changed the default project file from `plugin.project.json` to `plugin.project.json5` in `build.rs`.
- Added new project configuration files in JSON5 format for various test cases, including `default.project.json5`, `client_in_folder`, `csv_bug_145`, and others.
- Updated snapshot files to reflect changes in instance structure and properties, ensuring consistency with the new project configurations.
- Removed unnecessary script and module instances from snapshot files to streamline the testing process.

rojo-test/build-tests/unresolved_values/default.project.json

@@ -1,49 +0,0 @@
-{
-  "name": "unresolved-values",
-  "tree": {
-    "$className": "DataModel",
-
-    "Lighting": {
-      "$properties": {
-        "Technology": "Voxel",
-        "Ambient": [1, 0, 0]
-      }
-    },
-
-    "Workspace": {
-      "Color": {
-        "$className": "Part",
-        "$properties": {
-          "Color": [0.5, 0.25, 0],
-          "CFrame": [
-            1, 2, 3,
-            0, 1, 0,
-            0, 0, 1,
-            1, 0, 0
-          ]
-        }
-      },
-
-      "Bool": {
-        "$className": "BoolValue",
-        "$properties": {
-          "Value": true
-        }
-      },
-
-      "Int": {
-        "$className": "IntValue",
-        "$properties": {
-          "Value": 65
-        }
-      },
-
-      "Float": {
-        "$className": "NumberValue",
-        "$properties": {
-          "Value": 123.5
-        }
-      }
-    }
-  }
-}