chore: bootstrap gscMy on @gsc/web-kit + PAM/JIT request flow

Initial commit for gscMy carved out as its own repo (was tracked
loosely under the monorepo's web/ which is gitignored).

What this contains:
- Auth: next-auth v5 via @gsc/web-kit createAuth (Keycloak only,
  identity sourced from claims, no admin.users writes)
- Chrome: @gsc/web-kit AdminShell — replaces the legacy MyShell.
  Sidebar JSON config carried over and mapped to DbMenuItem.
- Middleware: createAuthMiddleware. Public: /access-denied,
  /auth/keycloak, /signed-out, /api/health, /api/pam/approve.
- RP-initiated signout at /api/auth/signout → Keycloak end_session →
  /signed-out (mirrors gscAdmin).
- Phosphor-iconned access-denied + signed-out landing pages.

PAM/JIT request flow (ported from gscAdmin's pre-strip git history):
- /access page (Active + Eligible tables, request modal with
  duration slider + justification + optional MFA)
- API: /api/pam/{eligible, active, audit, request, approve/:token,
  revoke/:id}
- src/lib/{authz, pam, pam-mail, pam-mfa}.ts — same files as
  gscAdmin had before the strip. PAM tables (admin.privilege_*)
  are shared with gscAdmin; gscMy uses the same Prisma model defs.
- Top-bar widget shows active grants with countdown + revoke.

Build/Deploy: Dockerfile (monorepo-root context), k8s manifests for
my.gosec.internal, self-signed TLS placeholder, DNS A record.
Keycloak gsc-my client extended to include my.gosec.internal/* in
redirect_uris + web_origins.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

public/locales/de/common.json

@@ -0,0 +1,23 @@
+{
+  "header": {
+    "apps": {},
+    "messages": {},
+    "search": {},
+    "notification": {},
+    "top-menu": {},
+    "sub-bar": {
+      "support": "Support",
+      "settings": "Einstellungen"
+    }
+  },
+  "menu": {
+    "support": "Support",
+    "settings": "Einstellungen",
+    "allSettings": "Alle Einstellungen",
+    "logout": "Abmelden"
+  },
+  "sidebar": {},
+  "footer": {
+    "docs": "Dokumentation"
+  }
+}

public/locales/en/common.json

@@ -0,0 +1,23 @@
+{
+  "header": {
+    "apps": {},
+    "messages": {},
+    "search": {},
+    "notification": {},
+    "top-menu": {},
+    "sub-bar": {
+      "support": "Support",
+      "settings": "Settings"
+    }
+  },
+  "menu": {
+    "support": "Support",
+    "settings": "Settings",
+    "allSettings": "All settings",
+    "logout": "Logout"
+  },
+  "sidebar": {},
+  "footer": {
+    "docs": "Docs"
+  }
+}

public/locales/fr/common.json

@@ -0,0 +1,23 @@
+{
+  "header": {
+    "apps": {},
+    "messages": {},
+    "search": {},
+    "notification": {},
+    "top-menu": {},
+    "sub-bar": {
+      "support": "Support",
+      "settings": "Paramètres"
+    }
+  },
+  "menu": {
+    "support": "Support",
+    "settings": "Paramètres",
+    "allSettings": "Tous les paramètres",
+    "logout": "Déconnexion"
+  },
+  "sidebar": {},
+  "footer": {
+    "docs": "Documentation"
+  }
+}