Add error page + edit init

src/components/CommonKit/ErrorPage/ErrorPage.tsx

src/components/CommonKit/ErrorPage/errorPage.scss

src/components/Ecogesture/SingleEcogesture.tsx

src/components/Splash/SplashRoot.tsx

src/db/ecogestureData.json

src/locales/fr.json

src/models/ecogesture.model.ts

src/services/ecogesture.service.ts

src/services/initialization.service.ts

tests/__mocks__/actionData.mock.ts

tests/__mocks__/ecogesturesData.mock.ts