feat: add hotel and vehicle option site modules

Add full support for hotel group and vehicle option site management features:
- Define SQLAlchemy models and alembic migration for the new database tables
- Add default sample content entries in content.py
- Extend admin and public API routes to support the new modules
- Update seed script to populate default hotel and vehicle data
- Update all relevant documentation and test cases

app/models.py

@@ -126,6 +126,32 @@ class CtaBanner(Base):
     updatedAt: Mapped[datetime] = mapped_column(DateTime, default=utc_now, onupdate=utc_now, nullable=False)
 
 
+class HotelGroup(Base):
+    __tablename__ = "HotelGroup"
+
+    id: Mapped[str] = mapped_column(String, primary_key=True, default=new_id)
+    title: Mapped[str] = mapped_column(String, nullable=False)
+    description: Mapped[str | None] = mapped_column(Text)
+    image: Mapped[str | None] = mapped_column(String)
+    sortOrder: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
+    isActive: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    createdAt: Mapped[datetime] = mapped_column(DateTime, default=utc_now, nullable=False)
+    updatedAt: Mapped[datetime] = mapped_column(DateTime, default=utc_now, onupdate=utc_now, nullable=False)
+
+
+class VehicleOption(Base):
+    __tablename__ = "VehicleOption"
+
+    id: Mapped[str] = mapped_column(String, primary_key=True, default=new_id)
+    title: Mapped[str] = mapped_column(String, nullable=False)
+    description: Mapped[str | None] = mapped_column(Text)
+    image: Mapped[str | None] = mapped_column(String)
+    sortOrder: Mapped[int] = mapped_column(Integer, default=0, nullable=False)
+    isActive: Mapped[bool] = mapped_column(Boolean, default=True, nullable=False)
+    createdAt: Mapped[datetime] = mapped_column(DateTime, default=utc_now, nullable=False)
+    updatedAt: Mapped[datetime] = mapped_column(DateTime, default=utc_now, onupdate=utc_now, nullable=False)
+
+
 class Product(Base):
     __tablename__ = "Product"