Refactor JSON handling and improve code clarity

- Updated error messages in Http.jsonDecode for better context.
- Enhanced serialization error handling in CompactJson5Serializer.
- Reformatted struct definitions in tests for improved readability.
- Adjusted assertions in tests for better clarity and consistency.
- Refactored project file name checks for improved readability.

plugin/http/init.lua

@@ -72,7 +72,7 @@ function Http.jsonDecode(source)
 	if success then
 		return result
 	end
-	print("[HTTP Response:json()] Native decode failed, using JSON5 for size:", #self.body)
+	print("[Http.jsonDecode] Native decode failed, using JSON5 for size:", #source)
 	return JSON5Decoder.Decode(source)
 end