Create Repository for SQL database for serverless

[EliuX]

We intend to use SQL database storage because it presents some advantages regarding to price, in comparison to other solutions like Cosmos DB. So let's try to install SQL locally or remotely with the serverless version when it is ready. Then try out whether we can have good performance when managing items. Let's try to:

• Create
• Get by id
• Get all entries
• Find by partially matching a string attribute of an object
• Delete

After we have this implementation we can check out how versatile and performant is it in from of another implementation like the one for Cosmos DB/Mongo.