DX improvements in BlockSuite 0.3.0

[doodlewind]

While the BlockSuite 0.3.0 release primarily focuses on Affine's December product release (see #149), we've still made several improvements to the developer experience of BlockSuite.

Done

• Playground support for quick link sharing (feat: support init with template #332). This allows you to encode the entire YDoc binary of a page as base64 and share it publicly, like the TS playground.
• New blocksuite-example-vite project that demonstrates how to install and use BlockSuite in your project in the easiest way possible.
• Daily nightly release version (ci: support nightly release #336).
• Faster and more complete CI process (ci: improve tsc check #361 ci: upgrade github actions #360 ci: split test and linter #341 ci: add codeql-analysis.yml #306).
• Link-based side-by-side debugging (documentation WIP).
• Vercel and Cloudflare Page support for quick PR previews.

Things that are happening

• More npm-compliant release configuration.
• Getting starter documentation for using BlockSuite as a dependency.
• Troubleshooting documentation for common problems.

Things that could happen in the future

• Better looking DebugMenu and playground UI.
• JSX-based playground import.
• More playground functionality and param configuration.

Thanks for the help from @himself65 and @lawvs for making these possible. I hope it helps!