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.

rojo-test/build-tests/ignore_glob_inner/subproject/default.project.json5

@@ -4,6 +4,6 @@
     "$path": "src"
   },
   "globIgnorePaths": [
-    "**/*.spec.lua"
+    "**/*.spec.luau"
   ]
 }

rojo-test/build-tests/ignore_glob_nested/default.project.json5

@@ -4,6 +4,6 @@
     "$path": "subproject"
   },
   "globIgnorePaths": [
-    "**/*.spec.lua"
+    "**/*.spec.luau"
   ]
 }

rojo-test/build-tests/ignore_glob_spec/default.project.json5

@@ -4,6 +4,6 @@
     "$path": "src"
   },
   "globIgnorePaths": [
-    "**/*.spec.lua"
+    "**/*.spec.luau"
   ]
 }

rojo-test/build-tests/infer_service_name/default.project.json5

@@ -4,7 +4,7 @@
     "$className": "DataModel",
     "ReplicatedStorage": {
       "Main": {
-        "$path": "main.lua"
+        "$path": "main.luau"
       }
     },
     "HttpService": {

rojo-test/build-tests/json_as_lua/default.project.json5

@@ -1,6 +1,6 @@
 {
   "name": "json_as_lua",
   "tree": {
-    "$path": "make-me-a-script.json"
+    "$path": "make-me-a-script.json5"
   }
 }