Refactor ISC github

[alaniwi]

• new branch: isc-2023

• create:

  • python-intro
  • python-data

• within each of them:

  • notebooks
  • solutions
  • example_data
  • example_code
  • slides

• within "python-intro/slides/":

  • include all of: python/presentations/learning_python/.

• within "python-data/slides/":

  • include all files from the following directories (without sub-directories):
  • python/presentations/data_tools/
  • python/presentations/handling_arrays/
  • python/presentations/read_write_data/
  • python/presentations/visualisation/

• NOTE: we can destroy:

  • presentations/logging-data-from-serial-ports

• review, merge into main, and then create a new release

[agstephens]

Hi @alaniwi, Is this ready for review? Thanks