feat: add generate strong password button to Add Members form

Add a "Generate strong password" button with Sparkles icon to the
Add Members form in Settings > People. Generated passwords are shown
in plain text with a copy button and an amber warning to copy before
creating the user. Also upgraded the button style on the change
password page to match. Translated copy/warning strings for all 21
locales.

Closes #139

packages/shared/src/i18n/sv.ts

@@ -1506,6 +1506,10 @@ export const sv: TranslationKeys = {
       resetPasswordAction: "Aterstall losenord",
       deleteUserAction: "Radera anvandare",
       saveButton: "Spara",
+      copyPasswordButton: "Kopiera losenord",
+      passwordCopied: "Kopierat!",
+      copyPasswordWarning:
+        "Kopiera detta losenord nu. Du kan inte se det efter att anvandaren har skapats.",
     },
     teams: {
       heading: "Team",