docs(wiki): overhaul handbook to match current app state
Rewrite and realign the German end-user handbook against the current implementation (controllers, templates, messages_de, ROLES_AND_PERMISSIONS.md).
- Warenauftraege: drop removed creating_squadron_id; document responsible vs requesting org unit, SK-public/squadron-private visibility, item orders, material claims, intake SK, PDF handover, material collection.
- Operationen: expand from stub to finances + payouts (shares, payout preference, paid-out asymmetry, preliminary values).
- Einsaetze: party lead, guest participation, finances, units/crew/frequencies, ship selection limited to participants.
- Rollen-und-Berechtigungen: per-membership Logistician/Mission-Manager flags, SK lead, contextual scope, anonymous vs Guest, refreshed matrix.
- Add Spezialkommandos page (org-unit/Bereich concept, switcher, SK order queue, member management).
- Administration: add Material Aliases, Sync Reports, Blueprints, Personal Blueprints (Admin); profit-eligible + intake SK settings.
- Hangar: /hangar/squadron route, CCU/HangarXPLOR/StarJump import, admin-only fitted reset.
- Update Lager, Handel (materials), Persoenliches-Inventar (Items/Blueprints), Raffinerie, Befoerderungssystem, FAQ, Home, Sidebar, Erste-Schritte; terminology Bereich/Org-Einheit and Handel.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Signed-off-by: Lucas Greuloch (greluc) <lucas.greuloch@pm.me>