docs: add aiLabel docs to CreateTearsheet

[devadula-nandan]

Closes #5369

this pr still adds some old and basic doc for slug, since this component, doesn't have aiLabel / decorators implemented yet from carbon

What did you change?

packages/ibm-products/src/components/CreateTearsheet/CreateTearsheet.docs-page.js

How did you test and verify your work?

storybook

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Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 79.61%. Comparing base (98b30f3) to head (bdd5862). Report is 6 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #6465 +/- ## ======================================= Coverage 79.61% 79.61% ======================================= Files 394 394 Lines 12871 12871 Branches 4268 4268 ======================================= Hits 10247 10247 Misses 2624 2624 ``` | [Components](https://app.codecov.io/gh/carbon-design-system/ibm-products/pull/6465/components?src=pr&el=components&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=carbon-design-system) | Coverage Δ | | |---|---|---| | [ibm-products](https://app.codecov.io/gh/carbon-design-system/ibm-products/pull/6465/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=carbon-design-system) | `∅ <ø> (∅)` | | | [ibm-products-web-components](https://app.codecov.io/gh/carbon-design-system/ibm-products/pull/6465/components?src=pr&el=component&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=carbon-design-system) | `∅ <ø> (∅)` | |

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