Move routing configuration infos to separate page

docs/organisation-tasks/routing.mdx

docs/organisation-tasks/subscriber.mdx

docs/receiving/destination.mdx

docs/sending/get-destination.mdx

sidebar.js

src/pages/docs/getting-started/first-steps.js

src/pages/docs/getting-started/receiving/destination.js

src/pages/docs/responsibilities/get-destination.js

src/pages/docs/responsibilities/routing.js