Create base endpoints for SaturationFunctionSet

Type of change

• Bug Fix
• Feature
• Documentation

Does this introduce a change in the core logic?

• [No]

Does this change the cloud provider implementation, and if so, which cloud?

• AWS
• Azure
• GCP
• IBM

Does this introduce a change that must be documented in the README.md file?

• [No]

Updates description?

• Add GET (lates version, specific version, all versions), DELETE (soft), POST of SaturationFunctionSet records
• Solves issues #621 (closed), #622 (closed), #623 (closed), #624 (closed), #625 (closed)