Added SIEM source feature

[agustinhydrolix]

Added SIEM source feature to the CLI + small fixes (catching errors and displaying them).

SIEM source commands:

• Create: hdxcli sources siem create SOURCE_FILENAME SOURCE_NAME
• List: hdxcli sources siem list
• Show: hdxcli --source SOURCE_NAME sources siem show [-i / --indent N]
• Delete: hdxcli sources siem delete SOURCE_NAME
• View settings: hdxcli --source SOURCE_NAME sources siem settings
• Modify setting: hdxcli --source SOURCE_NAME sources siem settings [KEY] [VALUE]

[hdxscott]

Good. I think splitting up the kafka/kinesis/siem into three separate files was the right idea.