docs(sl): add 23 Slovenian terminology mappings to glossary
New Izrazoslovje section — English concept → Slovenian name mapping:
jail/ječa, warden/paznik, confinement/zaprtost, prisoner/zapornik,
cell/celica, hive/panj, mother/matično vozlišče, node/vozlišče,
glasspane/steklena plošča, spawn/(samodejni) zagon, seed/seme,
vault/trezor, tenant/najemnik, skill/veščina, snapshot/posnetek,
rollback/povratek, harvest/žetev, bridge/most, daemon/ozadnji proces,
board/tabla nalog, scheduler/razporejevalnik, Bastille (trdnjava),
jailed/zaprt v ječi.
Cross-links added from existing ZFS, PF, and UI entries.
Total anchors: 38 (15 abbreviations + 23 terminology).