Add bionemo-recipes to documentation

[jwilber]

Add bionemo-recipes to documentation.

Also tidy-up image paths.

Video of recipes changes:

recipes-docs.mov

To run locally, from root:

docker build -t nvcr.io/nvidian/cvai_bnmo_trng/bionemo2-docs -f docs/Dockerfile .

docker run --rm -it -p 8000:8000 \
  -v ${PWD}/docs:/docs \
  -v ${PWD}/sub-packages:/sub-packages \
  -v ${PWD}/bionemo-recipes:/bionemo-recipes \
  nvcr.io/nvidian/cvai_bnmo_trng/bionemo2-docs:latest

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[jwilber]

/ok to test a3b3632