remove sd-kali and sd-ubuntu stubs (intentionally deleted)

restructure: standard/system split, rename ksd- to sd-, add wired pentesting config

- Split into standard/ (distro-based) and system/ (machine-specific)
- Rename all ksd- prefixes to sd-
- Add sd-wired: full Artix OpenRC pentesting deploy with BlackArch, mksh, plan9port
- Add sd-moirai, sd-motoko, sd-eva01 scaffolding
- Update all URLs from GitHub to sr.ht
- Update README, compile-all-pdfs.sh for new structure