moved images from quickstart to doc/img (#823)

docs/img/a_colorful_llama_doing_ai_programming.jpeg

docs/img/cat.jpeg

docs/img/gnocchi_alla_romana.jpeg

.../img/grocery_shopping_bascket_with_salmon_in_package.jpeg

docs/img/llama-mobile-confirmed.png

docs/img/llama-recipes.png

docs/img/llama_stack.png

docs/img/meta_release.png

docs/img/resized_image.jpg

docs/img/thumbnail_IMG_1329.jpg

docs/img/thumbnail_IMG_1440.jpg

docs/img/thumbnail_IMG_6385.jpg

recipes/quickstart/build_with_Llama_3_2.ipynb