feat: [show-all]="false" with scroll end event to load next page bottom

[iamrsojitra]

Bug Report or Feature Request (mark with an x)

- [ ] Regression (a behavior that used to work and stopped working in a new release)
- [ ] Bug report -> please search issues before submitting
- [x] Feature request
- [x] Documentation issue or request

I want to do [show-all]="false" for load pdf page by page but its replacing the previous page. Is there a way to load pdf next page at the bottom just like[show-all]="true" infinite scrolling.

[show-all]="true" takes too much time to load pdf