Première itération des opengraphs du partage de simulation cas type (#308)

package-lock.json

package.json

src/lib/components/piece_of_cake/Svg.svelte

src/lib/components/test_cases/TestCaseGraph.svelte

src/lib/server/test_cases.ts

src/lib/simulations.ts

src/routes/+page.svelte

src/routes/test_cases/og_image/[simulation]/+server.ts

src/routes/test_cases/simulations/+server.ts

src/routes/test_cases/simulations/[simulation]/+page.svelte