Create a timeline or a what's new page

[hyunbinseo]

With how fast the Svelte team is shipping, it's hard to catch-up the new features.

Sure there are change-logs, but it includes fixes, and are linked to PR not the specific docs.

I know there is a "What's new" post being prepared, but it's a one-time post. #1559

For example:

• 5.39.0: (experimental) async SSR
• 5.36.0: (experimental) await expressions