refactor: Convert api.js to ts (#28534)

apps/meteor/app/api/server/api.helpers.ts

apps/meteor/app/api/server/api.ts

apps/meteor/app/api/server/definition.ts

apps/meteor/app/api/server/helpers/parseJsonQuery.ts

apps/meteor/app/api/server/v1/channels.ts

apps/meteor/app/api/server/v1/settings.ts

apps/meteor/app/integrations/server/api/api.js

apps/meteor/definition/externals/meteor/accounts-base.d.ts

apps/meteor/definition/externals/meteor/ddp-common.d.ts

apps/meteor/definition/externals/meteor/ddp.d.ts

apps/meteor/definition/externals/meteor/rate-limit.d.ts

apps/meteor/definition/externals/meteor/restivus.d.ts

apps/meteor/ee/server/api/api.ts

...e/server/apps/communication/endpoints/appsCountHandler.ts

apps/meteor/tests/end-to-end/api/livechat/00-rooms.ts

...tests/unit/app/api/server/v1/lib/checkPermissions.spec.ts

packages/rest-typings/src/index.ts

packages/rest-typings/src/v1/auth.ts