How to create the data model without using sisense cli in my application using compose sdk

To address your API request specifically, `sdk-cli` package uses `/api/datasources/<datasource_name>/fields/search` endpoint to grab initial datasource information which is then converted to attributes:
https://github.com/sisense/compose-sdk-monorepo/blob/main/packages/sdk-query-client/src/query-api-dispatcher/query-api-dispatcher.ts#L26

Note: using this endpoint will not give the final result as `sdk-cli` will, some additional code transformations will be required. `createAttribute` mentioned earlier is one of the tools that would help