implement creating transfer code from existing ST

config/example-config.yaml

internal/config/config.go

internal/endpoints/token/access/accessTokenEndpoint.go

internal/endpoints/token/super/pkg/transferCodeRequest.go

internal/endpoints/token/super/pkg/transferCodeResponse.go

internal/endpoints/token/super/transfer.go

internal/model/grantType.go

internal/model/oidcFlow.go

internal/model/responseType.go

internal/server/api.go

internal/supertoken/event/pkg/event.go

internal/supertoken/superTokenHandler.go

internal/utils/ctxUtils/authHeader.go

internal/utils/dbUtils/dbUtils.go