chore(privacy): scrub real-org references from shared/ + root

Replace named real-world entity with fictional generic Norwegian
public-sector entity ("Direktoratet for digital tjenesteutvikling",
DDT) across the design system reference scenarios and root docs.
Repository is a private personal project; references to a real
organization were unintended and unrelated to the project.

- Rename: security-vegvesen.html -> security-direktorat.html
- Persona: replaced with fictional Kari Nordmann
- Domain refs / acronym / rule-IDs: SVV* -> DDT*
- Internal system names (Autosys etc.): replaced with fictional names

Phase 2 (plugin-internal references) follows in next commit.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

shared/playground-examples/templates.html

@@ -232,7 +232,7 @@
             <h2>Single-report</h2>
             <p class="tpl__lede">Én rapport, fire seksjoner: header med metadata + verdict-pill, hovedinnhold, sidefelt, signatur. Bygd for projector-bruk og PDF-eksport.</p>
           </div>
-          <span class="badge badge--soft">scenarios/security-vegvesen.html</span>
+          <span class="badge badge--soft">scenarios/security-direktorat.html</span>
         </div>
 
         <div class="tpl__demo" style="background: #fff; padding: var(--space-5);">
@@ -273,7 +273,7 @@
             <h2>Findings-review</h2>
             <p class="tpl__lede">Posture-grid + filter-bar + finding-kort + tiltaksplan. Strukturen i Scenario C i konsentrert form.</p>
           </div>
-          <span class="badge badge--soft">scenarios/security-vegvesen.html</span>
+          <span class="badge badge--soft">scenarios/security-direktorat.html</span>
         </div>
 
         <div class="tpl__demo" style="background: var(--color-surface);">