Docs for AutoBackbone & Backbone (#27456)
* Initial commit for AutoBackbone & Backbone
* Added timm and clarified out_indices
* Swapped the example to out_indices
* fix toctree
* Update autoclass_tutorial.md
* Update backbones.md
* Update autoclass_tutorial.md
* Add dummy torch input instead
* Add dummy torch input
* Update autoclass_tutorial.md
* Update backbones.md
* minor fix
* Update docs/source/en/main_classes/backbones.md
Co-authored-by: Maria Khalusova <kafooster@gmail.com>
* Update docs/source/en/autoclass_tutorial.md
Co-authored-by: Maria Khalusova <kafooster@gmail.com>
* Added illustrations and explained backbone & neck
* Update docs/source/en/main_classes/backbones.md
Co-authored-by: Maria Khalusova <kafooster@gmail.com>
* Update backbones.md
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Co-authored-by: Maria Khalusova <kafooster@gmail.com>
