Wrong folder structure under ecs folder

[AlexRuiz7]

Describe the bug
The ecs folder structure in the main branch does not match the folder structure on the 6.0.0 branch.

Expected behavior
Each subfolder should contain:

• a docs folder.
• an event-generator folder.
• a fields folder.
• no files at root folder.

Additional context
Example folder structure in the 6.0.0 branch.

states-inventory-hotfixes
├── docs
│   ├── fields.csv
│   └── README.md
├── event-generator
│   └── event_generator.py
└── fields
    ├── custom
    │   ├── agent.yml
    │   ├── host.yml
    │   ├── os.yml
    │   ├── package.yml
    │   └── risk.yml
    ├── mapping-settings.json
    ├── subset.yml
    ├── template-settings.json
    └── template-settings-legacy.json