feat: level selection

src/lib/data.ts

src/lib/game.ts

src/lib/utils.ts

src/routes/quiz/+page.server.ts

src/routes/quiz/new/+page.server.ts

src/routes/quiz/new/+page.svelte

src/routes/quiz/new/images/baby.png

src/routes/quiz/new/images/certificate.png

src/routes/quiz/new/images/conference-call.png

src/routes/quiz/new/images/crowd.png

src/routes/quiz/new/images/elderly-person.png

src/routes/quiz/new/images/index.ts

src/routes/quiz/new/images/running.png

src/routes/quiz/new/images/stick-fighting.png

src/routes/quiz/new/images/stroller.png

src/routes/quiz/new/images/student.png

src/routes/quiz/new/images/wallet.png