Develop a Python-based Github Profile Scraper Tool

We are seeking a skilled Python developer to create a robust and efficient tool for scraping GitHub user profiles. The tool should be capable of extracting publicly available information from specified GitHub profiles. Key functionalities should include: collecting user details (e.g., Username, bio, location, followers/following count), listing repositories (e.g., Repository name, description, stars, forks, language), and potentially recent activity. The final deliverable should be a functional Python script or application that can be easily run and configured. Consideration for ethical scraping practices and error handling is important. The output data should be structured and easily parsable, ideally in a common format like json or csv.