Docs: `genId()` is confusing

[tordans]

The docs mention genId() in multiple places which signaled to me that is something the library provides. Examples

• https://react-datasheet-grid.netlify.app/docs/performance/static-vs-dynamic
• https://react-datasheet-grid.netlify.app/docs/examples/unique-ids/

However, the docs don't go into any details on genId.

Searching the code https://github.com/search?q=repo%3Anick-keller%2Freact-datasheet-grid%20genId&type=code it looks like genId is a helper I should write myself.

Suggestion:

Update the docs to clarify that this is something I need to handle myself. Especially on the https://react-datasheet-grid.netlify.app/docs/examples/unique-ids/ page.