chore: add changesets

.changeset/big-singers-laugh.md

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+---
+'@astrojs/prism': major
+'@astrojs/rss': major
+'create-astro': major
+'@astrojs/cloudflare': major
+'@astrojs/deno': major
+'@astrojs/lit': major
+'@astrojs/netlify': major
+'@astrojs/node': major
+'@astrojs/partytown': major
+'@astrojs/preact': major
+'@astrojs/react': major
+'@astrojs/sitemap': major
+'@astrojs/solid-js': major
+'@astrojs/svelte': major
+'@astrojs/tailwind': major
+'@astrojs/vercel': major
+'@astrojs/vue': major
+'@astrojs/markdown-component': major
+'@astrojs/markdown-remark': major
+'@astrojs/telemetry': major
+'@astrojs/webapi': major
+---
+
+> Astro v1.0 is out! Read the [official announcement post](https://astro.build/blog/astro-1/).
+
+**No breaking changes**. This package is now officially stable and compatible with `astro@1.0.0`!

.changeset/lucky-clouds-fry.md

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+---
+'astro': major
+---
+
+> Astro v1.0 is out! Read the [official announcement post](https://astro.build/blog/astro-1/).
+
+If you need help migrating an existing Astro project to the new Astro v1.0, check out our updated [Migration Guide](https://docs.astro.build/en/migrate/) and [full documentation website](https://docs.astro.build/).