chore: get webinterface from main

uppaal2jetracer/webinterface/app/__init__.py

uppaal2jetracer/webinterface/app/assets/pdf/u2j_manual.pdf

uppaal2jetracer/webinterface/app/routes.py

uppaal2jetracer/webinterface/app/sockets.py

uppaal2jetracer/webinterface/app/static/icons/logo_basic.png

...jetracer/webinterface/app/static/scripts/event_handler.js

...acer/webinterface/app/static/scripts/events/main/clear.js

...acer/webinterface/app/static/scripts/events/main/parse.js

...racer/webinterface/app/static/scripts/events/main/stop.js

...acer/webinterface/app/static/scripts/events/main/theme.js

...face/app/static/scripts/events/versions/select_version.js

uppaal2jetracer/webinterface/app/static/scripts/main.js

...2jetracer/webinterface/app/static/scripts/page_handler.js

...tracer/webinterface/app/static/scripts/request_handler.js

uppaal2jetracer/webinterface/app/static/styles/index.css

uppaal2jetracer/webinterface/app/static/styles/login.css

uppaal2jetracer/webinterface/app/static/styles/project.css

uppaal2jetracer/webinterface/app/static/styles/settings.css

uppaal2jetracer/webinterface/app/static/styles/theme.css

uppaal2jetracer/webinterface/app/static/styles/version.css