* Feature: Add GraphQL data sources
* Querying graphql
* use graphlient gem to talk to a graphql datasource
* use the source headers and params while initializing the graphql-client
* remove unnecessary body field from the graphql source addition modal
* add documentation for graphql datasource setup
Co-authored-by: navaneeth <[email protected]>
* MS SQL server integration
* enable mssql service to test, create and process connection
* return 400 when query fails
* [Docker] Install freetds on buster
Co-authored-by: navaneeth <[email protected]>
