Design first version of Fedot.Web API

[J3FALL]

1. Design the use-cases, rest api endpoints
2. Discuss it with @nicl-nno
3. Implement blank REST end-points
4. Check that swagger specification is generated correctly

[J3FALL]

Get sample chain: /api/chain/sample

• Returns json with a sample chain: 1. sample chain -> 2. chain -> json -> 3. fedot.json -> 4. web.json -> controller Get all models: /api/models/{task_type: 'task_type'}: 1. ModelTypesRepository -> List[str] -> web-format -> web.json -> controller
• Get all task types: /api/tasks/
• Get all metrics: /api/metrics/
• Get all datasets: /api/datasets/: {dataset_id, description, task_type}