Navigation, Routing and Theming added

angular.json

mit-ws-20-21.wiki

package-lock.json

package.json

src/app/app.component.css

src/app/app.component.html

src/app/app.component.ts

src/app/app.module.ts

src/app/international/international.component.css

src/app/international/international.component.html

src/app/international/international.component.spec.ts

src/app/international/international.component.ts

src/app/login/login.component.css

src/app/login/login.component.html

src/app/login/login.component.spec.ts

src/app/login/login.component.ts

src/app/navigation/navigation.component.css

src/app/navigation/navigation.component.html

src/app/navigation/navigation.component.spec.ts

src/app/navigation/navigation.component.ts