## Description
Add `CandlestickChart` component for visualizing financial OHLC data
with candlestick patterns.
- Introduced a new CandlestickChart for displaying OHLC (Open, High,
Low, Close) values.
- Updated ChartStory to include stock price data and render multiple
candlestick chart variations.
- Enhanced theme with bullish and bearish colors for candlestick
representation.
- Updated documentation to include CandlestickChart examples and usage.
This addition enhances the charting library by providing a crucial tool
for visualizing stock market trends.
## Screenshot
<img width="1335" height="423" alt="image"
src="https://github.com/user-attachments/assets/5df7078e-a469-4262-b645-6434d08b7ccf"
/>
## How to Test
```bash
cargo run -p gpui-component-story
```
## Checklist
- [x] I have read the [CONTRIBUTING](../CONTRIBUTING.md) document and
followed the guidelines.
- [x] Reviewed the changes in this PR and confirmed AI generated code
(If any) is accurate.
- [x] Passed `cargo run` for story tests related to the changes.
- [ ] Tested macOS, Windows and Linux platforms performance (if the
change is platform-specific)
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