Adds a draft of subnetting-ipv4 (scheduled 2026-06-05) with three
interactive scenes: bit/mask visualization with prefix slider, greedy
VLSM carving of a parent block into variable-size children, and the
same-subnet-vs-gateway decision every host makes on every outbound
packet.
Also adds IDEAS entries for layer 2/3 routing and IPv4 subnetting.
Enables Zola feed generation (Atom + RSS) and adds autodiscovery link
tags in the base template. Sets site description and author so feed
entries have a real byline instead of "Unknown".
- Zola static site with zolanight theme
- Blog section with sample posts
- Projects section for listing external projects
- Custom index template showing latest post and recent posts list
