## Description
Simplify the conditional rendering logic in the ChartWidget component by
separating the cases for an empty chart and loading state. This improves
readability and maintainability of the code.
Fixes#36213
_or_
Fixes `Issue URL`
> [!WARNING]
> _If no issue exists, please create an issue first, and check with the
maintainers if the issue is valid._
## Automation
/ok-to-test tags="@tag.Chart"
### 🔍 Cypress test results
<!-- This is an auto-generated comment: Cypress test results -->
> [!TIP]
> 🟢🟢🟢 All cypress tests have passed! 🎉🎉🎉
> Workflow run:
<https://github.com/appsmithorg/appsmith/actions/runs/11288506543>
> Commit: 09b7635c04bbf72b12a6461deafc0789f7a04ea7
> <a
href="https://internal.appsmith.com/app/cypress-dashboard/rundetails-65890b3c81d7400d08fa9ee5?branch=master&workflowId=11288506543&attempt=1"
target="_blank">Cypress dashboard</a>.
> Tags: `@tag.Chart`
> Spec:
> <hr>Fri, 11 Oct 2024 08:17:45 UTC
<!-- end of auto-generated comment: Cypress test results -->
## Communication
Should the DevRel and Marketing teams inform users about this change?
- [ ] Yes
- [x] No
<!-- This is an auto-generated comment: release notes by coderabbit.ai
-->
## Summary by CodeRabbit
- **New Features**
- Enhanced the `ChartWidget` component for improved control flow and
readability.
- Introduced a streamlined rendering process for different chart states
(loading, empty, error).
- Added an optional `onDataPointClick` property to the
`ChartWidgetProps` interface.
- **Improvements**
- Modularized rendering logic for better maintainability.
- Added a comprehensive set of unit tests for the `ChartWidget`
component to ensure consistent rendering behavior across various states.
<!-- end of auto-generated comment: release notes by coderabbit.ai -->
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