Added visuality and json reader challenge - #11

Bugs / Issues:

1. Invalid typo and return without value returns None; then if not dic: will fail if your JSON is empty {}, [], 0, false
2. dic.items() will crash if the JSON root is a list, not a dict
3. os.listdir() with no path + printing everything in cwd on start is noisy and can leak sensitive dir info
4. No separation of concerns - logic, printing, and input all mixed together
5. No if name == "main": guard

We’re not including main.py due to the nature of the project. It’s designed to be a quick, grab-and-go setup where users can clone it, run it on their own systems, and learn from the README and solutions if needed. A file viewer isn’t necessary right now, since most file viewers and IDEs already handle that well.

We will not be adding live demos for any of the Python projects in this repository. This decision is made to ensure the security and trust of our users. By doing so, we allow them to run the clean code on their own systems without any compromise on our part.