Add user settings (#108)

Add email update

Add settings link to menu

Add password update route

Add password update page

Co-authored-by: kolaente <k@knt.li>
Reviewed-on: https://kolaente.dev/vikunja/frontend/pulls/108

src/models/emailUpdate.js

@@ -0,0 +1,10 @@
+import AbstractModel from './abstractModel'
+
+export default class EmailUpdateModel extends AbstractModel {
+	defaults() {
+		return {
+			newEmail: '',
+			passwort: '',
+		}
+	}
+}

src/models/passwordUpdate.js

@@ -0,0 +1,10 @@
+import AbstractModel from './abstractModel'
+
+export default class PasswordUpdateModel extends AbstractModel {
+	defaults() {
+		return {
+			newPassword: '',
+			oldPassword: '',
+		}
+	}
+}