Create list of CVE reproducers

[pevik]

Create separate page with a list of CVE reproducers. Generated in doc/conf.py, similarly to generate_syscalls_stats.

https://lore.kernel.org/ltp/aJsu4qw72EZiKnSP@yuki.lan/
https://lore.kernel.org/ltp/20250812114540.GC843668@pevik/