Unified CLI interface notes

[leoschwarz]

Pasting from my previous PR, this is only a starting point and needs to be refined for a proper CLI:

# General api interaction:
$CMD api read endpoint [attrib] [value]
$CMD api save endpoint id attrib value
$CMD api log write [workunitd] [message]

# For specific entities:
$CMD workunit list
$CMD workunit not-available
$CMD workunit update-status


$CMD dataset download
$CMD dataset upload
$CMD resource upload (? ideally just use app-runner functionality here?)

There remains some confusion as for how log and progress are used by different apps. -> to be checked and maybe needs to be made available in the relevant areas as well

tbd: testing and making sure future.annotations problem does not recoccur, maybe get in touch with dev