fix(ts): re-export core types and clean up docs (#9527)
* fix(sveltekit): reexport types for augmentation
* fix(docs): typescript augmentation docs
* fix: update next.js app router example app
* fix(docs): clean up typescript module augmentation examples
* fix(docs): small typo
* fix(docs): update user augmentation example usage in sesison callback
* fix(docs): add module augmentation sveltekit usage example
* fix(docs): clean up sveltekit popular augmentations example
* fix: pnpm-lock
* fix: typo
* fix: make express setupTests cjs file
