Update worked examples

[rwood-97]

This PR:

• Streamlines which worked examples we give to include:
  • Standard classification pipeline
  • Context classification pipeline
  • Text spotting with DPText-DETR and DeepSolo
  • Plant phenotype classification example
  • Mnist classification example
• Updates docker build, we don't pre-download all the maps in the docker build as we probably will intend this for use by general users vs workshops
• Adds a scheduled (1st of each month) github workflow to check worked examples are running fine with most up to date MapReader code

[rwood-97]

@kallewesterling could you check this still runs on your laptop and also potentially update the docker hub image after we have merged.

also sorry re. the number of files changes in this PR, it looks like loads but I think its not picking up renaming properly I fixed this

[kallewesterling]

Oh, this looks great @rwood-97. I can try to run it while attending the meeting tonight to see if it works :)

[kallewesterling]

LGTM