Rename templates

Closes first part of #170 (closed)

Procedure used for the renaming, e.g. of MicadoGenTecIllum to MicadoImgCalIllum:

rg MicadoGenTecIllum --files-with-matches | xargs sed -i 's/MicadoGenTecIllum/MicadoImgCalIllum/g'
bash build.sh # with deleting

Where the rm -f lines in build.sh are commented out.

Check for success with

rg -i --files-with-matches MicadoGenTecIllum
rg -i MICADO_gen_tec_illum

Only problem was MicadoGenCalBackground because it has a MicadoGenCalBackgroundExtra.py file. Fixed with

mv -vi src/micado/templates/MicadoGenCalBackgroundExtra.py src/micado/templates/MicadoImgCalBackgroundExtra.py