Changes to add category for powerboostlet

[adi-tsvet]

I have added the category variable to example files to make sure it get displayed in power boostlet.
Something like this. :
let boostletCategory = "LLM Models";

[github-actions]

✅ Test Passed ✅

Hi there @adi-tsvet! It looks like the tests passed successfully. 😃

Please check the https://github.com/mpsych/boostlet/actions/runs/9026486025 for more details.

If you want to access the screenshots taken for testing, you can do it through the developer's Claudinary management account, or through the workflow's artifacts.

[gaiborjosue]

Thanks for adding the categories!