feat: create project directory structure and env template

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

.env.example

@@ -0,0 +1,15 @@
+# SneakySwole Environment Configuration
+# Copy this file to .env and fill in real values.
+
+# Admin credentials (used to create admin user on first run)
+ADMIN_USERNAME=admin
+ADMIN_PASSWORD=changeme
+
+# App settings
+APP_ENV=development
+APP_HOST=0.0.0.0
+APP_PORT=8000
+APP_LOG_LEVEL=info
+
+# Database
+DATABASE_URL=sqlite:///data/sneakyswole.db