Move episode files to data/ root and update all references

Add graph visualization image at top of README

Change image container background to light gray

Use table-based frame for GitHub compatibility (borders work, rounded corners need image edit)

Enhance graph visualization frame with visible borders and rounded corners

Add graph visualization screenshot with Figma-style frame

Add Figma-style framed graph visualization section to README

Add emojis to H2 headings and enhance motivation sections

Portfolio preparation: enhance documentation, fix paths, add project structure

Add utility scripts, documentation updates, and configuration improvements

Reorganize repository structure and add documentation

Initial commit