Update README with Essential Information

[rifux]

The current README.md file lacks crucial information, making it difficult for users to understand and utilize the script effectively.

To improve the user experience, I will add the following essential details to the README:

1. Clear installation steps: Provide a step-by-step guide on how to install the script.
2. Script purpose and methodology: Explain the script's purpose, the problem it solves, and the reasoning behind the chosen approach.
3. Installed programs: List the set of programs installed by the script, so users know what to expect.
4. Important interactions and considerations: Warn users about potential interactions with directories outside their environment, deletion of user config files, and any other critical aspects they should be aware of.

By including this information, we can make the README more informative, user-friendly, and reduce potential issues or misunderstandings.