Refactor bot handlers and keyboards; implement admin features

- Removed unused prehandling, referrals, support, and states files.
- Updated admin and client handlers to improve structure and functionality.
- Introduced admin filters and routers for better access control.
- Added new billing and deposit functionalities for client interactions.
- Enhanced keyboard layouts for admin and client menus.
- Implemented promotion handling for admin users.
- Updated configuration to include admin settings.
- Improved utility functions for quote fetching and menu text building.
- Added common handlers for undefined commands and message deletions.

docker-compose.yml

@@ -29,6 +29,7 @@ services:
     environment:
       TZ: UTC
       BOT_TOKEN: ${BOT_TOKEN}
+      ADMINS: ${ADMINS}
       POSTGRES_URL: postgresql+asyncpg://${POSTGRES_USER:-malenia}:${POSTGRES_PASSWORD:-malenia_password}@postgres:5432/${POSTGRES_DB:-malenia_db}
       PROXY: ${PROXY:-}
       REMNAWAVE_URL: ${REMNAWAVE_URL}
@@ -53,6 +54,7 @@ services:
     environment:
       TZ: UTC
       BOT_TOKEN: ${BOT_TOKEN}
+      ADMINS: ${ADMINS}
       POSTGRES_URL: postgresql+asyncpg://${POSTGRES_USER:-malenia}:${POSTGRES_PASSWORD:-malenia_password}@postgres:5432/${POSTGRES_DB:-malenia_db}
       PROXY: ${PROXY:-}
       REMNAWAVE_URL: ${REMNAWAVE_URL}