Create chebi_ontology schema in postgresql

Following our new approach to centralize our data sources. We need to create a new schema called chebi_ontology in the PostgreSQL database. This schema will be used by the ontology generation process to create the robot templates. We need to check the sql folder in ChEBI Ontology Generator repository and decide which tables we need to create. Once the schema is finished, it must be included in the release pipeline (monthly and daily)