Unsitnize code

[rbovard]

Important note: the WMTS configuration is now in the .env, so you need to copy the sample file (the sample file is based on the current configration):

cp .env.sample .env

I also tried with an other WMTS server, with:

VITE_WMTS_CAPABILITIES_URL=https://wmts.asit-asso.ch/wmts/?SERVICE=WMTS&REQUEST=GetCapabilities
VITE_WMTS_BACKGROUND_LAYER_NAME=asitvd.fond_couleur
VITE_WMTS_MATRIXSET=2056

And the result is:

And with original values:

[maltaesousa]

Thanks for this refactor!