next 9.0.2-canary.0

Remove duplicated client code: #7907
Update docs for AMP export behavior: #7940
Prevent blocking while hidden: #7930
Added example for rbx and bulma-pro: #7728
Checks if object is not empty instead of whether the reference (object) is truthy: #7911
Replace windows backslashes with forward: #7942
Update link ref handling to clean up previous listeners: #7943
[Enhancement]: Refactor circleCI config: #7963
Check if dynamicOptions has the deprecated method property,: #7973
Don't externalize ssr-prepass if added by user: #7966
Fix example with-firebase-hosting-and-typescript: #7971
Fix: Ensure ergonomic handling of non-page in ./pages/: #7955
Example for API routes with middleware: #7958
Add empty publicRuntimeConfig to serverless tests: #7948
Add handling for invalid page config: #7921
Fix client-side hydration with dynamic routes: #7986
Fix GIP type in /_error page: #7952
Only copy public/ directory if enabled: #7988
Add default value for pageConfig for custom _error: #7984

Huge thanks to @sudkumar, @mvllow, @Restoration, @4cm4k1, @ijjk, @nataliemarleny, @felixmosh, @yukin01, and @huv1k for helping!