curiOS v25.10.0

Features:

- New container: neofetch, System information with curiOS/Infix ASCII art
- :latest tag support, releases push both version tags (e.g., :1.2.3) and
  :latest tag for easier container pulls/upgrades
- ENABLE_INTERFACES environment variable for nftables, automatically bring
  up/down interfaces at start/stop (e.g., ENABLE_INTERFACES="e1 e24")
- Local build tarballs, post-image script creates release-style tarballs

Improvements:

- Fixed OCI tarball structure, no directory wrapper for docker load
- Fixes OCI tag, use container name, more intuitive after docker load
- Add OCI description to each container image, human-readable text
- Updated Buildroot, bumped to v2025.02.7-kkit
- Enhanced documentation:
  - Added LICENSE badges (GPL v2) and GitHub Release badge
  - Added comprehensive "Building from Source" section
  - Added "Getting Images" section covering both registry and tarball methods
  - New CONTRIBUTING.md with guidelines for contributors
  - New SECURITY.md with vulnerability reporting process

Signed-off-by: Joachim Wiberg <[email protected]>