fix(l10n): no literal backticks in UI text, two stray informal imperatives

Text widgets render markdown backticks verbatim (usertest: reads
as typos / raw dev output) — stripped across both catalogs; code
terms stay inline in plain type. 'Zeig dem Hub' / 'Nimm das CLI'
now use the formal address; the guard test learns both stems.

Signed-off-by: flemming-it <stefan.a.flemming@googlemail.com>

test/l10n_formality_test.dart

@@ -26,7 +26,7 @@ void main() {
       r"\b(du|dich|dir|dein|deine|deiner|deinem|deinen|deins|"
       r"brauchst|tippst|willst|kannst|hast|bist|machst|siehst|"
       r"klickst|wählst|öffnest|startest|versuchst|versuch's|"
-      r"übergib|wähle|klicke|tippe)\b",
+      r"übergib|wähle|klicke|tippe|nimm|zeig)\b",
       caseSensitive: false,
     );
     final offenders = <String>[];