Add graphql api creation by SDL url and introspection

[nisan-abeywickrama]

Purpose

This feature enhances the GraphQL API creation capabilities by adding support for additional methods: creating APIs using an SDL URL and using the introspection method by providing an endpoint.

Implementation

• Added new radio buttons for GraphQL API creation using SDL URL and endpoint (for introspection).
• Made the endpoint input in the API creation UI readonly when creating a GraphQL API using an endpoint.
• Added new API call functions for validateGraphQLSchema using SDL URL and endpoint.
• Updated existing UI texts to reflect the new functionality.

[sonarqubecloud]

Quality Gate failed

Failed conditions
26.6% Duplication on New Code (required ≤ 3%)

See analysis details on SonarQube Cloud