docs: Correct the Svelte example

[pan93412]

The original Svelte example produces the “Function called outside component initialization” error, making the example unusable.

This PR refactors it with the SvelteKit and TypeScript. Also, defineCustomElements() is added to register the RevoGrid component correctly.

Note that:

• The current TS declaration is dirty. It should be refactored.
• The example currently lives in my repository. It should be moved to RevoGrid’s repository.

[sonarcloud[bot]]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarCloud