feat: new E2EE composer hint (#33283)

.changeset/many-files-turn.md

apps/meteor/client/views/room/composer/ComposerContainer.tsx

...s/room/composer/ComposerFederation/ComposerFederation.tsx

apps/meteor/client/views/room/composer/ComposerMessage.tsx

...teor/client/views/room/composer/messageBox/MessageBox.tsx

...nt/views/room/composer/messageBox/MessageBoxHint.spec.tsx

.../client/views/room/composer/messageBox/MessageBoxHint.tsx

packages/i18n/src/locales/en.i18n.json

...-composer/src/MessageComposer/MessageComposer.stories.tsx

...poser/src/MessageComposer/MessageComposerHint.stories.tsx