feat(psn): add PlayStation link card and PSN import

Settings card to link and unlink with the NPSSO, shows the expiry
date. Import page gets a PSN source; blocked when the link has ended.
English and German texts.

src/pages/SettingsPage.jsx

@@ -12,6 +12,7 @@ import DeleteAccountCard from '../components/DeleteAccountCard.jsx';
 import FollowsCard from '../components/FollowsCard.jsx';
 import PreferencesCard from '../components/PreferencesCard.jsx';
 import ProfileCard from '../components/ProfileCard.jsx';
+import PsnAccountCard from '../components/PsnAccountCard.jsx';
 import SteamAccountCard from '../components/SteamAccountCard.jsx';
 import {useCurrentUserContext} from '../context/CurrentUserContext.jsx';
 import useSettingsLoad from '../hooks/useSettingsLoad.js';
@@ -73,6 +74,8 @@ export default function SettingsPage() {
             <SteamAccountCard steamId={profile?.steamId} verified={!!profile?.steamIdVerified}
                               onUnlinked={() => updateProfile((p) => ({...p, steamId: null, steamIdVerified: false}))}/>
 
+            <PsnAccountCard/>
+
             <ProfileCard displayName={displayName}/>
 
             <FollowsCard/>