Add Angular support to ECharts Examples project

[Manahil-Afzal]

Issue

Fixes issue: Add support for using ECharts in Angular projects.

Solution

• Installed ngx-echarts and echarts in the project.
• Created a sample Angular component (ChartComponent) to render charts.
• Implemented a live data update example to demonstrate Angular integration.
• Verified charts render correctly in Angular and update dynamically.

Testing

1. Run Angular project using ng serve.
2. Navigate to /chart route to see the chart.
3. Confirm chart renders correctly and updates live data if applicable.

Before:

After Testing (Angular ECharts Demo):

Screenshot:

The demo is shown using Angular’s development server (ng serve).

Note:
This PR adds a complete Angular example integration, which required
introducing new components, configuration, and documentation files.
No unrelated files were modified.