Storytelling and polishing

[Asifdotexe]

The goal is to add fun and informative elements that user would appreciate

Tasks

• Implement the "Death rate prediction" i.e., to calculate the slope of decay and "show a year of total replacement" metric
• Add "Philosophical tooltips" i.e., where a user hover over a sharp drop in the graph, probably show a message like "A major refactor happened here Is this still the same ship?"
• Add a fossil finder i.e., highlight the single oldest file or line that has survived since the first commit