Add SmolLM3 (#38755)
* init smollm3
* integration tests
* config quirks
* docs stub
* rests round 2
* tests round 3
* tests round 4
* bring SWA back
* config checker pls
* final checkpoint
* style and copies
* Update src/transformers/models/smollm3/modular_smollm3.py
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
* Update src/transformers/models/smollm3/modular_smollm3.py
Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
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Co-authored-by: Arthur <48595927+ArthurZucker@users.noreply.github.com>
