Consider replacing current PDF viewer with https://www.embedpdf.com/

[abhitrueprogrammer]

Current PDF viewer causes PDF flashes when + or -, which triggers epilepsy. Use this library to fix the issue

spsl mention for suggestion library: @mglsj

[mglsj]

library: https://www.embedpdf.com/
our implementation: https://github.com/gehuhaldwani/pyqs/blob/gh-pages/src/components/widgets/PdfViewer.astro
our demo: https://haldwani.gehu.in/pyqs/bca/sem%201/c/end/tbc101_tbi101_endsem_2023_jan.pdf/