fix: privacy in sign up

- allow no mail registration after dismissing marning banner
- defaultly hide password characters

Signed-off-by: TheOneWithTheBraid <the-one@with-the-braid.cf>

assets/l10n/intl_de.arb

@@ -896,7 +896,7 @@
     "type": "text",
     "placeholders": {}
   },
-  "enterAnEmailAddress": "Gib eine E-Mail-Adresse ein",
+  "enterAnEmailAddress": "E-Mail-Adresse (nicht erforderlich)",
   "@enterAnEmailAddress": {
     "type": "text",
     "placeholders": {}

assets/l10n/intl_en.arb

@@ -955,11 +955,13 @@
     "type": "text",
     "placeholders": {}
   },
-  "enterAnEmailAddress": "Enter an email address",
+  "enterAnEmailAddress": "Email address (not mandatory)",
   "@enterAnEmailAddress": {
     "type": "text",
     "placeholders": {}
   },
+  "emailContinueAnyway": "Continue anyway",
+  "emailEmptyWarning": "Warning: Even though adding a mail address leaks sensitive personal data, you have no way to recover your password without it.",
   "enterASpacepName": "Enter a space name",
   "@enterASpacepName": {},
   "enterAUsername": "Enter a username",

assets/l10n/intl_fr.arb

@@ -910,7 +910,7 @@
     "type": "text",
     "placeholders": {}
   },
-  "enterAnEmailAddress": "Saisissez une adresse de courriel",
+  "enterAnEmailAddress": "Adresse de courriel (ne pas mandatoire)",
   "@enterAnEmailAddress": {
     "type": "text",
     "placeholders": {}

lib/pages/sign_up/signup_view.dart

@@ -93,7 +93,8 @@ class SignupPageView extends StatelessWidget {
                     color: Colors.black,
                   ),
                   hintText: L10n.of(context)!.enterAnEmailAddress,
-                    errorText: controller.error),
+                  errorText: controller.error,
+                ),
               ),
             ),
             Hero(