Feat/train code snippets (#2654)

# Description

Please include a summary of the changes and the related issue. Please
also include relevant motivation and context. List any dependencies that
are required for this change.

Closes #<issue_number>

**Type of change**

(Please delete options that are not relevant. Remember to title the PR
according to the type of change)

- [ ] Bug fix (non-breaking change which fixes an issue)
- [ ] New feature (non-breaking change which adds functionality)
- [ ] Breaking change (fix or feature that would cause existing
functionality to not work as expected)
- [ ] Refactor (change restructuring the codebase without changing
functionality)
- [ ] Improvement (change adding some improvement to an existing
functionality)
- [ ] Documentation update

**How Has This Been Tested**

(Please describe the tests that you ran to verify your changes. And
ideally, reference `tests`)

- [ ] Test A
- [ ] Test B

**Checklist**

- [ ] I have merged the original branch into my forked branch
- [ ] I added relevant documentation
- [ ] follows the style guidelines of this project
- [ ] I did a self-review of my code
- [ ] I made corresponding changes to the documentation
- [ ] My changes generate no new warnings
- [ ] I have added tests that prove my fix is effective or that my
feature works
- [ ] I have added relevant notes to the CHANGELOG.md file (See
https://keepachangelog.com/)

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Co-authored-by: leire <[email protected]>
Co-authored-by: Tom Aarsen <[email protected]>