Example by type:

Assets
└── _Project
    ├── Art
    ├── Audio
    ├── Materials
    ├── Prefabs
    ├── Scenes
    ├── ScriptableObjects
    ├── Scripts
    └── Settings

Example by feature:

Features
├── Inventory
│   ├── Scripts
│   ├── Prefabs
│   └── UI
├── Combat
└── Dialogue

Feature-based organization often scales better in larger projects.