Create animated 2Ds showing transition between 2D structures from PDB files

[AntonPetrov]

@fryzjergda Hi Tomasz! 👋

Here is an outline of the mini-project that we discussed:

• Please base your work on the develop R2DT branch as it contains the latest code 💎
• Install RNAview in the base_image Dockerfile (starter code: Dockerfile-rnaview) 🎉
• Write a new utility script that will take 1 PDB file, annotate basepairs, parse results, and generate R2DT diagrams 💪
  • The starter code is in rnapuzzles-prepare-fasta.py, rnaview.py, and rnapuzzles_run_r2dt.py
• Write a new utility script that will take 2 PDB files and generate 2 template-free R2DT diagrams and an animation between them 🎨
  • The starter code is in animate_puzzles.py
  • Ensure that the new command can be launched similar to this: docker run -it --rm rnacentral/r2dt:animate-3d bash -c "python3 utils/animate3d.py pdb1 pdb2 output.svg"
• Add 2 tests to confirm that both new scripts run as expected 🤓
• Add a new page to documentation ✍️
• Send a pull request to the develop branch in this repo ✅

I will send the starter code by email. Please let me know if you have any questions. Thanks a lot!