… data

Introduce two new reusable chart components to visualize hierarchical and
proportional data. FlameGraph renders nested call trees, file systems, or
profiling data with width representing value and color indicating category.
StackedBar displays horizontal stacked bars for gas breakdowns, budget
allocation, or resource usage with interactive tooltips and legends.

Both components include comprehensive Storybook stories covering EVM call
trees, file system usage, performance profiles, budget examples, and edge
cases like empty states and deep nesting.