refactor: Types of Meteor methods (8/N) (#28511)

apps/meteor/app/federation/server/methods/dashboard.js

apps/meteor/app/federation/server/methods/dashboard.ts

apps/meteor/app/livechat/server/lib/Livechat.js

apps/meteor/app/livechat/server/methods/addAgent.ts

apps/meteor/app/livechat/server/methods/addManager.ts

apps/meteor/app/livechat/server/methods/getAgentData.ts

...eteor/app/livechat/server/methods/getAgentOverviewData.ts

...teor/app/livechat/server/methods/getAnalyticsChartData.ts

...r/app/livechat/server/methods/getAnalyticsOverviewData.ts

apps/meteor/app/livechat/server/methods/getCustomFields.ts

...vechat/server/methods/getDepartmentForwardRestrictions.ts

...meteor/app/livechat/server/methods/getFirstRoomMessage.ts

apps/meteor/app/livechat/server/methods/getNextAgent.ts

apps/meteor/app/livechat/server/methods/getRoutingConfig.ts

apps/meteor/app/livechat/server/methods/getTagsList.ts

apps/meteor/app/livechat/server/methods/loadHistory.ts

apps/meteor/app/livechat/server/methods/loginByToken.ts

apps/meteor/app/livechat/server/methods/pageVisited.ts

apps/meteor/app/livechat/server/methods/registerGuest.ts

apps/meteor/app/livechat/server/methods/removeAgent.ts