Convert notebooks to marimo

[ngrayluna]

Adds helper scripts that:

• make_list.py: Reads in CSV file (hand made) and creates a .txt files with path files to source notebook. Output is
  • marimo/notebook_paths.txt
• scripts/convert-colab-to-marimo.py: Reads in .txt file (optional --batch) and converts, checks each colab notebook to marimo .py. Create the following:

  Success → .conversion/result.json
  marimo convert failure → result.json + marimo-convert.log
  marimo check failure → result.json + both command logs
  

Converted files are written to ./marimo/convert