Add console.log that executes single time for entire page

It should invite user to use variables:
```
deep
ml
```
And so on.
May be even with an examples or links to documentation.

How to configure localstorage.debug and so on.

Checklist

- [X] `pages/index.tsx` ✅ Commit [`761d620`](https://github.com/deep-foundation/deepcase-app/commit/761d620c852963f72e64c113a2df66f54c9b5cde)

• At the beginning of the `Content` function, add a console.log statement that provides information about the usage of the `deep` and `ml` variables. The statement should look something like this: `console.log("You can use the 'deep' and 'ml' variables for xyz. For more information, visit the documentation at [link to documentation].");`
• In the same console.log statement, provide information on how to configure localStorage.debug. The statement should look something like this: `console.log("You can configure localStorage.debug by doing xyz. For more information, visit the documentation at [link to documentation].");`

Review pages/index.tsx and the checklist commit 761d620 first to determine whether the requested console output is already present. Verify the page emits the usage and localStorage.debug guidance once, and check that any referenced documentation links are valid.

Written by the indexing model from the issue text.