feat: initial Jimi Gallery prototype

- Public site (Home/Artists/Exhibitions/News/About/Contact) with EN/KO/JA i18n
- Admin panel with login, CRUD, image upload, multilingual editing
- Exhibition slider/lightbox view
- FastAPI + MongoDB backend, JWT auth
- Docker Compose deployment, behind nginx at jimi.yakenator.io

.gitignore

@@ -0,0 +1,32 @@
+# Python
+__pycache__/
+*.pyc
+*.pyo
+*.pyd
+.Python
+.venv/
+venv/
+env/
+
+# OS
+.DS_Store
+Thumbs.db
+
+# Editors
+.vscode/
+.idea/
+*.swp
+*.swo
+
+# Env / secrets
+.env
+.env.local
+*.pem
+
+# Build artifacts
+*.log
+dist/
+build/
+
+# Local data
+mongo_data/