Add user registration and auth web app

FastAPI + Jinja2 + MariaDB web application with registration,
login, profile, password reset, and email confirmation flows.
All UI in Russian. Styled with Evotor brand colors.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>

.gitignore

@@ -13,3 +13,6 @@ run/test.log
 vk/whitelist
 logs/
 passwords.txt
+.env
+__pycache__/
+*.pyc