[Total Automation] Check for merge compatibility and Kaggle eligibility

[jmuchovej]

Mostly needed for Kaggle Kernels, but can also be used for something like GitHub Actions.

Tasks

• (🔑 Required) Evaluate notebook candidacy to be merged back into the group's repository
  • Check that the "non-solution" notebook can be generated without error.
  • Check that all other steps can be run without error (downloading papers, generating banners, compiling website pages, etc.)
• (🔑 Required) If the notebook is merged back into master, rebuild the website and propagate new changes.
• (🔑 Required) diff candidate notebook from the one on Kaggle