[React] Replace Geo Map tutorial with IgrGrid in Getting Started documentation

[Copilot]

Overview

This PR updates the React Getting Started tutorial in doc/en/components/general-getting-started.md to demonstrate how to create an application with the IgrGrid component instead of the GeographicMap component.

Changes Made

Component Import Updates

• Removed: GeographicMap module imports with registration

  import { IgrGeographicMapModule, IgrGeographicMap } from 'igniteui-react-maps';
  import { IgrDataChartInteractivityModule } from 'igniteui-react-charts';
  IgrGeographicMapModule.register();
  IgrDataChartInteractivityModule.register();

• Added: IgrGrid import with CSS styling

  import { IgrGrid } from 'igniteui-react-grids';
  import 'igniteui-react-grids/grids/themes/light/bootstrap.css';

Component Usage Example

Replaced the GeographicMap example with a functional IgrGrid example:

function App() {
  const data = [
    { name: "John", age: 30 },
    { name: "Jane", age: 25 },
    { name: "Bob", age: 35 }
  ];

  return (
    <div style={{ height: "100%", width: "100%" }}>
      <IgrGrid
        data={data}
        autoGenerate="true">
      </IgrGrid>
    </div>
  );
}

Documentation Updates

• Updated component reference link from [**GeographicMap**](geo-map.md) to [**Grid**](grids/data-grid.md)
• Changed descriptive text from "map component" to "grid component"
• Updated final result description from "interactive map of the world" to "data grid with sample data"
• Changed sample reference from /maps/geo-map/display-osm-imagery to /{GridSample}/overview

Scope

• ✅ Changes only affect React-specific code blocks (TypeScript sections)
• ✅ Blazor and WebComponents sections remain unchanged
• ✅ Consistent with existing grid documentation patterns
• ✅ No security vulnerabilities introduced

Fixes the issue by providing React developers with a more relevant and commonly-used component (data grid) in the getting started tutorial.

Original prompt

---

This section details on the original issue you should resolve

<issue_title>[React] Replace the Geo Map Getting Started tutorial with IgrGrid</issue_title>
<issue_description></issue_description>

<agent_instructions>the getting started topic for React has a tutorial explaining how to create an app with the Infragistics geo map control. Change the tutorial to explain correctly how to add an igrGrid instead.</agent_instructions>

Comments on the Issue (you are @copilot in this section)

Fixes #1738

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