feat(message-parser): add timestamps pattern (#31810)

.changeset/stupid-trains-trade.md

apps/meteor/client/components/GazzodownText.tsx

...c/templates/ChatTranscript/markup/elements/StrikeSpan.tsx

packages/gazzodown/.storybook/main.js

packages/gazzodown/package.json

packages/gazzodown/src/Markup.stories.tsx

packages/gazzodown/src/MarkupInteractionContext.ts

packages/gazzodown/src/elements/ImageElement.tsx

packages/gazzodown/src/elements/InlineElements.tsx

packages/gazzodown/src/elements/StrikeSpan.tsx

packages/gazzodown/src/elements/Timestamp/ErrorBoundary.tsx

packages/gazzodown/src/elements/Timestamp/index.tsx

packages/gazzodown/src/elements/Timestamp/timeago.ts

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

packages/message-parser/README.md

packages/message-parser/package.json

packages/message-parser/src/definitions.ts

packages/message-parser/src/grammar.pegjs

packages/message-parser/src/utils.ts

packages/message-parser/tests/timestamp.test.ts