feat: port everything to leptos 0.7

aep-schedule-website/Cargo.lock

aep-schedule-website/Cargo.toml

aep-schedule-website/src/backend/fileserv.rs

aep-schedule-website/src/backend/routes.rs

aep-schedule-website/src/backend/state.rs

aep-schedule-website/src/frontend/app.rs

...le-website/src/frontend/components/common/autocomplete.rs

...le-website/src/frontend/components/common/number_input.rs

...hedule-website/src/frontend/components/common/schedule.rs

aep-schedule-website/src/frontend/components/common/tab.rs

...ule-website/src/frontend/components/icons/bell_ringing.rs

aep-schedule-website/src/frontend/components/icons/bug.rs

...e-website/src/frontend/components/icons/calendar_check.rs

...edule-website/src/frontend/components/icons/calendar_x.rs

...bsite/src/frontend/components/icons/caret_double_right.rs

...chedule-website/src/frontend/components/icons/download.rs

...dule-website/src/frontend/components/icons/gitlab_logo.rs

aep-schedule-website/src/frontend/components/icons/house.rs

...dule-website/src/frontend/components/icons/plus_circle.rs

aep-schedule-website/src/frontend/components/icons/sun.rs