feat: implement user profile management with avatars, login, and personal data

- Add avatar upload functionality with public URL access.
- Implement user login with email and password authentication.
- Create endpoints for fetching and updating the authenticated user's profile.
- Set up database migrations for user profiles, including email and role management.
- Introduce personal data management linked to user profiles.
- Add email verification process with welcome email templates.

registration/mails/welcome_text.tmpl

@@ -0,0 +1,6 @@
+Hello {{.Name}},
+
+Your account has been created successfully.
+
+Confirm your email address by opening this link:
+{{.WelcomeURL}}