ref(types): sentry API supports breadcrumb as string

[cadesalaberry]

Is there a way to backport this change to the 7.x version?

A timestamp representing when the breadcrumb occurred. The format is either a string as defined in RFC 3339 or a numeric (integer or float) value representing the number of seconds that have elapsed since the Unixepoch.
Breadcrumbs are most useful when they include a timestamp, as it creates a timeline leading up to an event expection/error.

https://develop.sentry.dev/sdk/event-payloads/breadcrumbs/#:~:text=is%20info.-,timestamp,-(recommended)

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Contributing guidelines and verify:

• If you've added code that should be tested, please add tests.
• Ensure your code lints and the test suite passes (yarn lint) & (yarn test).

Lint fails on unrelated code:

lerna ERR! yarn run lint exited 1 in '@sentry/wasm'

Tests fails on unrelated code:

@sentry/utils:     src/is.ts:4:45 - error TS2307: Cannot find module '@sentry/types'.

[AbhiPrasad]

I assume this is superceded by #11119?

[mydea]

Hey, thank you for opening this PR. We will for now not widen the API like this, as it increases bundle size and complexity. We may revisit this in the future. Still, thank you for your contribution - we really appreciate it!