Chore: Adding default message parser template (#26064)

apps/meteor/app/lib/server/startup/settings.ts

apps/meteor/app/markdown/server/settings.ts

apps/meteor/app/ui-utils/client/lib/messageContext.js

apps/meteor/app/ui/client/views/app/room.html

.../message/Attachments/Attachment/AttachmentDescription.tsx

...ts/message/Attachments/Attachment/AttachmentTitleLink.tsx

...ent/views/account/preferences/PreferencesGlobalSection.js

...lient/views/room/MessageList/components/MessageHeader.tsx

...lient/views/room/MessageList/components/MessageSystem.tsx

apps/meteor/package.json

apps/meteor/packages/rocketchat-i18n/i18n/en.i18n.json

apps/meteor/server/startup/migrations/index.ts

apps/meteor/server/startup/migrations/v276.ts

apps/meteor/tests/e2e/06-messaging.spec.ts

apps/meteor/tests/e2e/07-emoji.spec.ts

apps/meteor/tests/e2e/13-permissions.spec.ts

apps/meteor/tests/e2e/pageobjects/MainContent.ts

apps/meteor/tests/end-to-end/api/00-miscellaneous.js