Update the update yaml script

[justaddcoffee]

• Move update_yaml.py script into main cli()
• Add unit tests

[justaddcoffee]

Making this a draft, because for some reason click can't find the update_yaml command

[justaddcoffee]

TODO:

• per convo with @caufieldjh, fix bug when updating multiple nested keys - solution for now is to support specifying nested keys like this --keys graph_data:graph:node_path --values my/new/node/path

[justaddcoffee]

Adding - @caufieldjh I've made a unit test here for this - unskip this once you've implemented the nested key thing above

[caufieldjh]

TODO:

• per convo with @caufieldjh, fix bug when updating multiple nested keys - solution for now is to support specifying nested keys like this --keys graph_data:graph:node_path --values my/new/node/path

Done - keys now need to be specified like key1:key2:key3, but a list of different keys can still be provided, e.g. key1:key2:key3,key4:key5,key6

[sonarcloud[bot]]

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