Just out of old habits, tend to try do everything first with the core bin tools and then jq. Not saying jq is not useful ...

Command:

  echo "SAP-samples/cloud-sdk-js
  SAP-samples/cloud-cap-samples-java
  SAP-samples/btp-setup-automator
  SAP-samples/btp-ai-sustainability-bootcamp
  SAP-samples/cloud-cap-samples
  SAP-samples/ui5-exercises-codejam
  SAP-samples/cap-sflight
  SAP-samples/cloud-cf-feature-flags-sample
  SAP-samples/cloud-espm-cloud-native
  SAP-samples/iot-edge-samples
  " | column       --json       --table-name SILLY_STRING       --table-columns $(seq --separator=, 1 1)

Output:

  {
     "SILLY_STRING": [
        {"1": "SAP-samples/cloud-sdk-js"},
        {"1": "SAP-samples/cloud-cap-samples-java"},
        {"1": "SAP-samples/btp-setup-automator"},
        {"1": "SAP-samples/btp-ai-sustainability-bootcamp"},
        {"1": "SAP-samples/cloud-cap-samples"},
        {"1": "SAP-samples/ui5-exercises-codejam"},
        {"1": "SAP-samples/cap-sflight"},
        {"1": "SAP-samples/cloud-cf-feature-flags-sample"},
        {"1": "SAP-samples/cloud-espm-cloud-native"},
        {"1": "SAP-samples/iot-edge-samples"}
     ]
  }