Add Ontology Creation from GraphQL

[YANG-DB]

Is your feature request related to a problem?

Adding support for converting the GraphQL schema to the general Ontology structure that will eventually be transformed into a specific index provider physical representation of that structure in the OpenSearch data store

What solution would you like?

Create an AST tree visitor to traverse and map the GraphQL SDL elements into the Ontology Elements

What alternatives have you considered?

none

Do you have any additional context?

See https://github.com/YANG-DB/open-graph/tree/main/docs