added test print statements to stage 004 for SH testing

Correct file names in import statements. Revised ONS SYOA reference files for age 90+ to be 90, so that iloc works as intended.

commit changes to stages 1-5

Merge branch 'main' of https://github.com/hsma4-student/shine

updated file name

incorporated additional error control and option to not run ML models (e.g. where source data not appropriate)

Update README.md

added logos, user guide & yaml file for environment

correcting folder structure for reference files

folder structure containing open public reference data only

adding code files for HSMA4 project plus further development since

Initial commit